This single tender spring kit is designed to support and secure air lines and power cables on trucks, semi trucks, trailers, and tractors. The spring helps keep lines elevated and properly tensioned, reducing drag while providing buffering and protection during vehicle operation. Spring Construction The tender spring is manufactured from carbon steel with a galvanized finish to help resist rust, corrosion, and environmental exposure. The spring provides elasticity suitable for continuous, heavy-duty use and maintains performance across a range of temperatures. 3-Hole Clamp Holder The included 1/2"" three-hole clamp holder is made from durable black nylon designed to resist crushing and wear. When installed with a lock nut, it securely holds multiple air hoses and power cords together for stable routing. 3-in-1 Air Line Holder The 3-in-1 air line holder is constructed from widened 304 stainless steel for corrosion resistance. An integrated EPDM rubber cushion helps protect air hoses and electrical lines by reducing abrasion and providing cushioning when lines are bundled. Widened Hook Design The kit includes a heavy-duty widened hook with a 2"" opening to accommodate larger diameter crossbars commonly found on commercial vehicles. The painted surface provides additional resistance to corrosion. Function and Use The tender spring helps pull air and electrical lines upward, minimizing contact with the deck or road surface. The spring acts as a buffer to support consistent positioning of hoses and cables during driving. Compatibility Designed for use on commercial vehicles and compatible with or replaces the following part numbers: Phillips 17-145 Tectran 9421-1 Specifications Spring Length: 20 inches Spring Material: Galvanized carbon steel Air Line Holder Material: 304 stainless steel with EPDM rubber cushion Clamp Holder: 1/2"" three-hole nylon clamp