Overview Reviews Product Description Canopy Fitting TUBE KNUCKLE CLAMPS Fits on outside of tube. Suits Tube Diameter: 22mm O.D Total Size: 29 x 29 x 53mm Product Videos Custom Field Product Reviews Write a Review Write a Review × Tube Knuckle Clamp 22mm Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *