Tigerchocks 200 series aviation wheel chocks are designed for business, commercial, cargo, and military aircraft. They feature a contoured design that fits curvature of the tire to absorb wheel squat during loading and fueling operations. These chocks are made from impact-absorbing urethane and are resistant to oils, chemicals, fuels, and hydraulic fluids used in the aviation industry. For additional safety and convenience, Tigerchocks 200 series wheel chocks include a 3/8" x 24" replaceable nylon rope lanyard to connect two chocks together (custom rope lengths are also available). These lightweight wheel chocks also feature a molded-in, high visibility color for easy identification. They are easy to use and ideal for carrying on aircraft. Weight: 1.5 lbs. Measures 5.5" length by 4.5" width by 2.75" height. Available in yellow color.