The standard Quick-Flex red insert is made from a relatively soft urethane compound
This insert is well suited for a wide range of applications
The standard insert excels in vibration dampening and cushioning of shock loads and is best for reversing applications or applications with quick starting and stopping of high-inertial loads
This insert offers an operational temperature range of -50° C to 100° C (-60° F to 212° F)
There are three other insert materials available for varying conditions:
Blue - Mid ~ High torque rated insert
Black - Highest torque rated insert
White - High temperature insert