Damper. A component that isolates one part from another. An example would be a coil spring insulator. The insulator would isolate the coil spring and a mounting surface. A rubber ring with a hole in the center which provides protection through which another component can pass through. Secondary Air Injection Pump Mount. A. I. R. pump grommet. Air pump damper. Air pump mount cushion. RUBBER. Secondary Air Injection Pump Grommet. Secondary Air Injection Pump Insulator. Secondary Air Injection Pump Mount.