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PRODUCT INFORMATION If the car coil spring gap is between 37mm-42mm when it is lifted and unloaded, please choose B type Increased comfort and stability for driving through bumpy roads. Protects shock absorbers and suspension systems Specifications: Material: Rubber Color: Black Type: Car Coil Spring Buffer Outer Height: 71 mm Inside Height: 40 mm Outer Diameter: 160 mm Inner Diameter: 109 mm Groove Diameter: 12 mm Groove Depth: 17 mm Thickness: 26 mm Groove Opening: 9 mm Fitment: Universal fit most cars, trucks and SUVs. Installation: Jack the car Remove tires. Cleans coil springs. Attach the coil spring buffer to the center of the spring. Tighten tires with cable ties. Install the tire. NOTE: Please check the size you need before you buy it. Package: 2 x Type B Car Coil Spring Buffer