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 2025-05-02 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 Ezzy Batten Tension Adjuster Patrik RDM Cambers Chinook Rubber Power Joint 8mm with stainless studs Chinook Footstrap Retaining System Chinook Deck Washer K4 Fins US Box Blanker Chinook 4 mm Prestretch Rope Patrik Slot Box Box Blanker 130mm Surf Sail Australia Vent Screw O Ring Chinook QR Deck Plate