Chinook Windsurfing Vented fin box vent screw footstrap inserts Chinook Windsurfing heavy duty board building parts if you making or repairing a damaged surf wing windsurf board Replacement FIN BOX from Chinook for surf board kiteboard wing board repairs or building, this is in either 8" Fin Box Outside Dimensions: L-20.4cm x W-2.6cm x D-3.2cm or 10" ( outside Dimensions: L-26.7cm x W-2.7cm x D-3.5cm.) Chinook Sailing 1" Board Vent w/Thumb Screw approx 3cm 5-Hole Micro Adjustable Foot Strap Inserts. Outside length: 2.52”(64mm) Outside width: 0.53”(13.5mm) Outside depth: 1.14”(29.5mm) Hole spacing: 0.50”(12.5mm) Hole Depth: 1.01”(25.5mm) Screw size/type: M6 thread forming(Plastite, PT, etc...) The worlds most popular OEM new build and repair fin boxes and foot strap inserts an vent screw Material: Durable Glass Reinforced Plastic More Windsurfing Accessories Boardworx Youtube