GBA Bumper, Free Height: 1.49 in./37.8 mmBase Diameter: 1.48 in./37.6 mmPeak Force: 2,800 lbs./12,500 N – GBA 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 bumpers are inert and performance is not affected by dirt, oils and other chemicals. Which makes them the ideal bumper for any application involving shock absorption or collision protection. GBA bumpers are perfect for applications where there is a requirement for high load energy absorption with less travel.