Low weight and maximum performance for small aircrafts. Mark I Chock is designed for smaller aircraft and helicopters. However, it works great as a hangarchock for all sizes of aircraft. The block is made of durable, lightweight polyurethane. The material is resistant to extreme weather conditions, oils, propellants, as well as a high tear and abrasion resistance. Thanks to the material properties, the block will never rot, crack or splint. Tests have shown that Mark I Shock takes more wheel force than conventional rubber blocks. To increase the product´s user-friendliness a loop, with a interlaced reflex, is attached to the product. Thanks to the shape of the block in combination with the loop, it is easy to place next to the wheelbase. The material is 100% recyclable.