Each K-series bell must contain one diaphragm cushion to operate correctly. This cushion is the direct replacement for AirChime K-Series horns and should be installed if the original cushion is damaged.
Each K-series bell has 2 diaphragms and 1 diaphragm cushion. We do sell diaphragm kits as well which will have all three pieces needed to fully repair a bell.
This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.