Product CatalogueSports and OutdoorsWindsurfing OtherBits and PiecesChinook SDM Mast Extension Collar And Pin Back Chinook Chinook SDM Mast Extension Collar And Pin Product ID: c175 Brand: Chinook 2025-01-25 From: $41.50 AUD View or buy the Bits and Pieces Windsurfing Other - Chinook SDM Mast Extension Collar And Pin from Chinook to discover other options and shipping details. Description Tried and trusted. Fits 46mm extension tubes. Back to Windsurfing Other - Bits and Pieces More Bits and Pieces and others in our range Goya Footstrap Anti Twist Washer Chinook Delrin Flat Washer Patrik Windsurfer Nose Protector Select Fin Box Adaptor Bic (Trim) Patrik Adjustable Batten End Patrik Tuttle Box Box Blanker EXOCET EVA Nose Protector Chinook QR Deck Plate No Hardware Patrik US Box G10 Blanker Surf Sail Australia Mini Tuttle Plastic Cover