Imedical Healthcare Solutions
The Stryker LUCAS 2 Rubber Bumpers (1 Pair) (#11576-000070) are rubber seals that are placed over the hinge end caps. This protects both users and the hardware from damage or wear. Each order comes with two rubber bumpers. 
Note: These are designed for use with the LUCAS 2 device only.
Warranty: 90 Days.
Stryker LUCAS 2/3 Chest Compression System Genuine Accessories Guide