ITEM NAME:Boat Parts Cover Canopy Fitting Tube Knuckle Clamp Fits 22mm Tube Frame Hinged Description: Boat cover/ canopy knuckle clamp Suits 22mm/ 0.87inch bar or tube outer diameter Heavy duty marine 316 grade stainless steel casting Attaching canopy/ cover bars or frames to other bars/frames or deck hinges Round Hole Inner Diameter: Approx. 22 mm/0.87inch Package Includes: 1 Piece Boat Canopy Tube Clamp Fitting SKU: DMO0009932254016189.Boat cover/ canopy knuckle clamp. 1 Piece Boat Canopy Tube Clamp Fitting. Heavy duty marine 316 grade stainless steel casting.