Product details:

These metal industrial dust collection fittings are simply the best you can find - period! Features: Simple to install No more bolts, screws or duct tape No more duct tape Install clean-outs anywhere Connects easily to existing duct work More efficient dust pick-up Easy to add-on or modify Industrial quality Use hose adapters to convert from solid pipe to flexible hose. Formed ridge holds hose on tightly with the help of a hose clamp. Made in USA.