Product CatalogueSports and OutdoorsWindsurfing OtherConstruction and Repair PartsChinook 8 inch Mast Box Vented With Screw Back Chinook Chinook 8 inch Mast Box Vented With Screw Product ID: 302 Brand: Chinook 2025-05-25 From: $33.99 AUD View or buy the Construction and Repair Parts Windsurfing Other - Chinook 8 inch Mast Box Vented With Screw from Chinook to discover other options and shipping details. Description The first choice by quality board builders, 2 sizes 8 inch and 10 inch, built in vent screw Back to Windsurfing Other - Construction and Repair Parts More Construction and Repair Parts and others in our range Chinook Fin Box 8 inch 8 inch Mast Track Box Chinook Footstrap Plugs Slot Box Fin Box Fin US Box 8 inch Patrik 4-Hole Adjustable Foot Strap Inserts Chinook Board Vent With Thumb Screw 1 Inch Chinook 7-Hole Micro Adjustable Foot Strap Inserts Chinook Board Vent Retro Fit with slot Screw .625 inch Chinook Board Vent Retro Fit with Thumb Screw 5-8 inch