EXTENSIVE APPLICATION: The CheeMuii single tender spring kits are used to hold the air hoses and power cord, which can tighten these lines and spring plays a role in buffering and protection. And the air lines spring kits are suitable for truck, semi truck, trailer and Tractor. Replaces for Tectran 9421-2, for Automann 177.3007, for Tramec Sloan 451748, for Phillips 17-1482, for Velvac 580071 ANTI-SLIP AIR LINES HOLDER: The 3 in 1 air lines holder is made of heavy-duty widened stainless steel, and it is equipped with an anti-slip rubber pad, which can fix the air hose and electric power cord very well GALVANIZED CARBON STEEL SPRING: The 20" heavy duty spring is made of high quality carbon steel with good elasticity and toughness, which can run normally and have a long service life at high intensity. And the surface of the spring is galvanized, which can prevent rust and corrosion PROTECTIVE COVER: The solid plastic protective sleeve effectively prevent spring from wound with the wires and air hoses. And avoid the internal spring exposure to the sun and rain, effectively extend the service life PREMIUM WIDENED HOOK: Heavy-duty widened 2" wide hooks to fit large diameter crossbars, preventing hooks from being too small to use. And the surface has been painted to effectively prevent rust and corrosion Cheemuii 20" Single Tender Spring Kit with Trailer Hose Holder Heavy Duty Tender Spring for Semi Truck Air Lines Kit 3 in 1 Air Lines Holder for Semi Truck Trailer Tractor