Rope Chocks’ Official U.S. Patent design prevents vehicles, trailers, aircraft, equipment or anything with small to medium-sized tires/wheels from moving or rolling due to environmental conditions, uneven surfaces or bumps. Ideal for business, commercial, cargo and military aircraft.  Its diameter is 1.25". Features: Designed for small-to-medium-sized aircraft Lightweight, each Rope Chock weighs 1.5 lbs. Easy storage and handling Safe and non-marking construction. Won’t damage aircraft interiors or exteriors like block-style chocks No rattling around while on ground or in the air. Impact-absorbing, lightweight polypropylene Weather and abrasion resistant Resistant to fuels, oils, and lubricants Eliminates Foreign Object Damage (FOD) Easy to install High-visibility color scheme