FEATURES & BENEFITS: Life Cycle Lasts 3-Times Longer than Previous Design; Larger 3.75 Diameter Housing Eliminates Spring Binding; New Base is Over 3 -Times Larger than the Competition; Increased Resistance to Sagging and Bending; New Thicker Gauge Heavy Duty Spring; Used for All Nylon and Rubber Air Brake Hose; Choice of Chrome or Zinc Plated Dichromate Steel Support Arm; Forged Steel Mounting Stud, 7/16"-20; All Pogo Sticks Include Eyebolt and Nut