Made in the USA
Expert sizing support
National Safety Mirror

National Safety Mirror

Outdoor Rectangular Convex Mirror - Rounded Edges

Roundtanglular Convex Mirror with Hardboard Backing

Outdoor Rectangular Convex Mirror - Rounded Edges

SKU SRTABS-PB

From$106.00$320.00

or 4 interest-free payments of $26.50 with Afterpay

Compare every SKU, description, and price in the options table below before adding to cart.

The roundtangular or rectangular security mirror is a popular choice for many users. The straight edge across the top makes it the best option when mounting near a ceiling.

This is a great parking garage mirror where ceilings tend to be lower and space is limited, or on loading docs. The heavty duty plastic back is great for virtually any outdoor environment.

Expert sizing support
Quality guaranteed
Made in the USA
Expert support

Best for

Driveway Mirror & Traffic MirrorsGarage MirrorRectangular Convex MirrorWarehouse blind cornersParking exits

Sizing help

Use the 1 inch = 1.5 feet guideline as a starting point, then adjust for vehicle speed, lighting, mounting height, and obstructions.

18 in: up to 27 ft24 in: up to 36 ft30 in+: 45 ft or more
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Specifications

Lens material
Acrylic
Field of view
160° convex
Use
Driveway Mirror & Traffic Mirrors · Garage Mirror · Rectangular Convex Mirror
Sizes
12″ · 18″ · 20″ · 24″
Brackets
Single telescoping · Double telescoping
Made in
USA

Outdoor Rectangular Convex Mirror - Rounded Edges at a glance.

Pick your configuration below. Each row is a real, purchasable SKU with the size, bracket, and backing already paired.

  • Available in 12″, 18″, 20″, and 24″. Pick the diameter that matches your viewing distance and the space you have to mount.
  • Acrylic lens with plastic Backing. Outdoor rated-rated build designed for rectangular Convex Mirror.
  • Bracket options: Single telescoping or Double telescoping. Each configuration ships with the bracket and hardware needed for that SKU.
  • From $106.00 to $320.00. Current configurations are in stock and ship quickly from the USA.

Options

Available sizes, brackets & prices

Compare each option by SKU, price, and description, then add the exact row you want to cart.

Size:
Bracket:
SKUSizeBracketCovers*PriceDescriptionQtyAdd
SRTABS-12X18
12″Single telescopingup to 18 ft
$106.00
12×18 Heavy Duty Rountangular Acrylic Mirror with Plastic Back & Single Telescoping Bracket
SRTABS-18X26
18″Single telescopingup to 27 ft
$151.00
18×26 Heavy Duty Rountangular Acrylic Mirror with Plastic Back & Single Telescoping Bracket
DRTABS-18X26
18″Double telescopingup to 27 ft
$186.00
18×26 Heavy Duty Rountangular Acrylic Mirror with Plastic Back & Double Telescoping Brackets
SRTABS-20X30
20″Single telescopingup to 30 ft
$199.00
20×30 Heavy Duty Rountangular Acrylic Mirror with Plastic Back & Single Telescoping Bracket
DRTABS-20X30
20″Double telescopingup to 30 ft
$228.00
20×30 Heavy Duty Rountangular Acrylic Mirror with Plastic Back & Double Telescoping Brackets
SRTABS-24X36
24″Single telescopingup to 36 ft
$292.00
24×36 Heavy Duty Rountangular Acrylic Mirror with Plastic Back &Single Telescoping Bracket
DRTABS-24X36
24″Double telescopingup to 36 ft
$320.00
24×36 Heavy Duty Rountangular Acrylic Mirror with Plastic Back & Double Telescoping Brackets

* Coverage estimate uses the 1-inch = 1.5-foot guideline from the NSM sizing guide.

Outdoor Rectangular Convex Mirror - Rounded Edges description & specifications

A roundtangular convex mirror is shaped like a rectangle with curved ends, featuring a convex lens. A "roundtangular convex mirror" provides the benefits of a convex mirror. Still, the flat top and bottom allow it to fit nicely against lower ceilings and offer a broader view than a traditional, circular-shaped convex mirror.

How Large Should My Safety Mirror Be?

There's an industry-wide, accepted standard that you can see every inch in mirror size at one foot of distance. Although this isn't a perfect number, it provides an idea of the type of mirror you might need.

The mirror lens is acrylic and is available in the mirror sizes below. Acrylic is lightweight and seventeen times more impact-resistant than glass, offering a sharp, bright view. These are outdoor-rated because the backing is a heavy-duty plastic-based substance that will withstand humidity, rain, and dust that might damage an indoor-rated mirror with a hardboard back.'

The plastic backing is made from high-density polyethylene, perfect for harsh weather conditions. High heat, extreme cold, salt water, and snow won't affect this rigid material with a thickness of 1/8'' inch.

The mirror is also offered with a galvanized steel backing as well. The 20-gauge steel is though and rigid. However, it is more expensive and weightier than its heavy-duty plastic backing counterpart. We recommend the plastic back unless you have a specific need for the steel backing. It does a little better in colder and hotter conditions and performs well in wet conditions.

Rubber trim surrounds the mirror edge to protect the backing and backside of the lens from weather elements.

Mounting is either with a z-bracket for smaller mirrors or telescoping brackets. This link provides detailed information about the different mounting options. We recommend triple telescoping mounting brackets for large mirrors or mirrors where the wind is prevalent. Remember, the larger the mirror, the more brackets you should consider. If you plan to mount this mirror in highly windy locations, please use the triple telescoping mounting options below.

Many customers like to use this mirror type as a driveway mirror. Although this is a good choice, we would like to caution against their use in areas with a lot of wind. Because of the more extensive profile, wind can be an issue. If you choose a rectangular mirror, we advise purchasing a mirror with 3 x telescoping mirror mounting arms. For more details on mounting options, please click here.

Another option to consider is the new DomeVex mirror. The DomeVex Safety Mirror is an acrylic mirror that offers a 180-degree view versus the 160-degree provided by a traditional convex mirror. With this wide-angle view and lower profile than the rectangular-shaped mirror, the DomeVex mirror with heavy-duty plastic backing is an excellent choice.

Mounting & installation

Rectangular Mirror Size: 12x18, 18x26, 20x30, 24x36

Backing: Plastic Backing, Galvanized Steel

Bracket Type: Telescoping Bracket

Qty of Brackets: Single, Double

Lens Type: Acrylic

Indoor/Outdoor: Outdoor Rated

Shipping & returns

Most National Safety Mirror orders ship quickly from the USA. Exact lead time depends on the product family, size, and bracket configuration selected.

If you need a bulk quote, project guidance, or confirmation before ordering, you can request a bulk quote or call NSM at 678-214-3440 before checkout.

FAQ

How do I decide between round and rectangular convex mirrors?

Round convex mirrors provide balanced wide-angle coverage and are popular for simple corners and intersections. Rectangular convex mirrors stretch the view horizontally, which helps in long aisles, low-clearance garages, wide driveways, ramps, and locations where side-to-side visibility matters most.

Why are convex mirrors recommended for driveways, alleys, and parking garage exits?

These areas often have blocked sight lines caused by walls, fences, vehicles, landscaping, or tight turns. A convex mirror gives drivers a wider view of cross traffic and pedestrians before they pull out, turn, or back up.

How do I work out what size traffic mirror I need for a blind bend?

Start with viewing distance and vehicle speed. The 1 inch of mirror diameter per 1.5 feet of viewing distance rule is a useful baseline, then size upward for faster approaches, long sight distances, or complex junctions.

What is a traffic safety mirror?

A traffic safety mirror is a convex mirror used to improve visibility at roadways, driveways, blind bends, parking lot exits, and vehicle intersections. It helps drivers see cross traffic and pedestrians where direct line of sight is limited.

See more questions in the full FAQ.

Related guides

Related mirrors and guides

Compare similar mirrors, check the mounting options, or read up on sizing before you order.

Convex vs dome guide

Compare mirror types when the garage application could still swing between one-direction and multi-direction visibility.

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