Aircraft wheel chocks are designed for small aircraft and aviation equipment. They are manufactured with highly durable, lightweight polyurethane, which lasts longer than wooden chocks, never needs painting, and eliminates Foreign Object Damage threats for aircraft. AC200 Aircraft Wheel Chocks fit the curvature of the tire to absorb wheel-squat during loading and fueling operations. They also feature a molded-in soft base for increased traction. These chocks are sold in pairs with a 3/8 in. x 24 in. replaceable polyester rope lanyard connecting the two chocks together. Custom rope lengths are available. Ideal for business, commercial, cargo, and military aircraft.