Product CatalogueSports and OutdoorsWindsurfing OtherConstruction and Repair PartsChinook 10 inch Mast Box Vented With Screw Back Chinook Chinook 10 inch Mast Box Vented With Screw Product ID: 324407 Brand: Chinook 2025-05-03 From: $37.99 AUD View or buy the Construction and Repair Parts Windsurfing Other - Chinook 10 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 3-Hole Micro Adjustable Foot Strap Inserts Chinook Footstrap Plugs 5 Hole Footstrap Inserts Chinook 7-Hole Micro Adjustable Foot Strap Inserts Chinook Vent Thumb Screw Fin US Box 8 inch Chinook Fin Box 8 inch Chinook 5-Hole Micro Adjustable Foot Strap Inserts Patrik Vent Screw Insert Chinook Gor Tex Vent Valve