Replacement filter casing lock for the Alaskan and Denali All-In-One cold plunge tubs. An official original manufacture part that threads easily onto the filter case. Includes: All-In-One filter casing lock. Compatible with: Alaskan All-In-One Cold Plunge Denali All-In-One Cold Plunge For more information or to speak with one of our cold plunge experts, contact us at 1-800-567-8036.