Genesis COML DC381 Screw Cuffs, Black, 2" ID Screw cuff for connecting vacuum tools or machines to a duct hose Black PVC provides strength and abrasion resistance Suitable for applications with temperatures up to 160 degrees F, such as residential and light commercial vacuuming Threaded end screws onto Flexaust Genesis COML (Commercial), DPZ, Flx Plus, Uni-Loop, and ULT hoses and Flex-Tube FlexStat hoses (sold separately)