Speidel Replacement Locking Cap - Genuine OEM PartThe Speidel Replacement Locking Cap is a essential OEM component for Speidel plastic fermenters and storage tanks. This heavy duty threaded cap is designed to secure the airlock or the blanking plug into the oversized top opening of the vessel. Constructed from high impact, food grade HDPE, it features a specialized ergonomic grip for easy tightening and removal. Precision molded for a perfect factory fit, it ensuring a 100% airtight seal when used