XIANQI Widely used----Marine Tube Connector,Especially designed for 22mm OD tube/Pipe.Suitable for folding sun canopies,bimini tops,flag poles,masts etc.Flattening the surface after polishing, and surface roughness is reduced. for bimini stainless folding swivel 22mm bow rail hinge replacement for boat rails stainless steel Corrosion resistance----Marine Pipe Connector,Made of high quality 316 stainless steel and durable in use.Maximum corrosion resistance and durability in the saltwater environment.Good fit,very little play in the joint.Made of quality stainless steel. Used to make a access door for my railing on my boat. for bimini stainless folding swivel 22mm bimini stainless folding swivel 22mm replacement for bimini tops for boats 180 degrees folded----Folding Swivel Coupling,This tube connector permits 2 sections of tubing to be folded down up to 180 degrees.Easy to install without extra adjustment. replacement for tube hinge They said----Boat Folding Swivel Coupling,Good quality product.Used these to make the grab rail around the windshield on my center console fold down so I can now fit the boat in the garage or hide it from the HOA behind the fence. replacement for folding mast pole Quantity1pc Size75.6mm in length22.6mm in width.