TTC Urethane Cushion Buffer B: B SIZE : 38&plusmn;5mm Please Read the Description to learn how to properly measure for the right product 1. Noticeably absorbs shocks during passing over the speed bumps. 2. Prevents rolling due to tension control of a coil spring during sharp cornering 3. Reduces vibration on the bumpy or rough roads. 4. Protects shock absorbers from the shocks (durability increases more than 2 times) 5. Braking distance reduces after installation of cushion buffers. 6. Reduces the muscle rigidity phenomenon during long distance driving by minimization of micro vibration caused by suspension 7. Restores road clearance when car is overloaded.