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 2024-12-05 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 Chinook Deck Washer Select Fin Box Adaptor Power Chinook Fin Bolt Neoprene Washer Chinook Rubber Power Joint Joint 8mm Chinook Skinny Adaptor Kit Chinook Webbing Tendon Safety Strap Chinook 4 mm Prestretch Rope K4 Fins Slot Box Box Blanker 130mm Surf Sail Australia Mini Tuttle Plastic Cover Patrik Mast Extension Adjustable Collar SDM