Professional EZ Travel Collection 3-Pack, Big Rig, Foldable Emergency Roadside Warning Triangle Reflector (D.O.T. Approved) 3-PACK WARNING TRIANGLE - This EZ Travel collection item comes with three foldable D.O.T. approved warning triangles. Use to alert motorists day or night so you may keep passengers safe. Often used for road construction, work trucks, tractors, trailers, maintenance vehicles, and other safety equipment. ILLUMINATING TRIANGLE REFLECTOR - The bright reflector on both sides of the triangle is safe at night and can warn traffic up to a half a mile away at night! Perfect for use in Fog, rainy, snowy, mud, wind season, and it is ideal for emergency situations. DURABLE - These warning triangles are designed to withstand high winds and extreme weather conditions. You can use them any time of the year. CASE INCLUDED - As an extra bonus, this 3-pack of warning triangle reflectors comes with a carrying case which makes it easier than ever to transport and carry with you. This carrying case allows the reflecting triangles to be neatly organized, so there is never a question of where they might be. PERFECT SIZE - The dimensions of these triangles are: 17.5 x 17.5 x 17.