GBA-S Bumper, Free Height: 3.11 in./79.0 mmBase Diameter: 2.82 in./71.6 mmPeak Force: 3,700 lbs./16,500 N – GBA-S bumpers are made from our proprietary TecsPak material. Tests have shown that TecsPak is 10 times more durable than rubber and 20 times more durable than urethane. GBA-S bumpers are inert and performance is not affected by dirt, oils and other chemicals. GBA-S bumpers are meant for medium load applications. Which makes them the ideal bumper for any application involving shock absorption or collision protection.