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 2025-05-05 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 Vent Thumb Screw Chinook Slot Box Fin Box Chinook 3-Hole Micro Adjustable Foot Strap Inserts Chinook 10 inch Mast Box Vented With Screw Chinook 5-Hole Micro Adjustable Foot Strap Inserts Chinook Mast Track Box 8 inch Chinook Gor Tex Vent Valve Chinook Board Vent With Thumb Screw 1 Inch Chinook Tuttle Fin Box Chinook Board Vent Retro Fit with Thumb Screw 5-8 inch