Tread Ahead?no-slip dual-sided grips give tires the total traction they need to speedily get out of slippery or sticky situations (snow, mud, ice) that would normally require shoveling, towing or help from others. Simply place beneath front of the stuck tire and go! Dual grip technology offers traction on top and a slip-resistant bottom. Also works as an ice scraper. Plastic. Car, 13 1/2"L x 6"W x 1"H, SUV, 23 1/2"L x 8"W x 1"H