Yosa (Size B) Car Auto Shock Absorber Spring Bumper Power Cushion Buffer Special Wholesale 2Pcs/lot Benz'z buffer suspension theory is that the power Cushion buffer to effectively reduce shock power 80% of the noise is effectively absorbed by suspension system the buffer can release " sudden force" up to 0.8~1 ton, according to different models. The buffer can make a extension of the life of suspension system. B-type Size: Spring clearance: 37mm , Spring thickness: 13mm ,Spring diameter: 160mm