4-Inch Flexible Rubber Coupling Sleeve with Thumb-Screw Key Hose Clamp

This is a heavy-duty black flexible rubber coupling collar designed to bridge connections securely. It features a built-in stainless steel hose clamp equipped with an easy-turn yellow thumb screw (key), eliminating the need for a screwdriver or nut driver during adjustment. Perfect for connecting dust collection hoses to power tools or joining similarly sized plumbing drain pipes.