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 2025-05-25 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 Board Vent With Slot 1 Inch Chinook 8 inch Mast Box Vented With Screw Fin US Box 8 inch Chinook 3-Hole Micro Adjustable Foot Strap Inserts Chinook Mast Track Box 8 inch Slot Box Fin Box Chinook Tuttle Fin Box Chinook Fin Box 8 inch Chinook Power Fin Box Chinook Fin Box 10 inch