Revotec - Duct Hose Joining Collars

A simple and highly effective method for securely sealing ducts and intake hoses. Each collar features an adhesive inner edge that bonds as the collar shrinks when exposed to a gentle heat source, such as a hair dryer. The collar can shrink by up to 63 percent of its original size, creating a robust, tidy, water-resistant, and vibration-proof joint.