The ILME CKR-65 is a gasket & screw sealing kit for the CK, CQ-05, and CKS series size 21.21 inserts. Used to reach IP 66/67/69 protection. When this sealing kit is used, the original screw and washer that came with the insert may be discarded. The CKR-65 features a longer screw than the one that comes with the insert. Screw is stainless steel and the gasket is thermoplastic.