Product CatalogueSports and OutdoorsWindsurfing OtherBits and PiecesChinook SDM Mast Extension Cap Back Chinook Chinook SDM Mast Extension Cap Product ID: 178 Brand: Chinook 2025-09-01 From: $14.99 AUD View or buy the Bits and Pieces Windsurfing Other - Chinook SDM Mast Extension Cap from Chinook to discover other options and shipping details. Description Plastic cap for Chinook SDM mast extension. OD 48mm fits 44mm tube Back to Windsurfing Other - Bits and Pieces More Bits and Pieces and others in our range Chinook Adjustable Collar And Pin For SDM Extension Select Fin Box Adaptor Bic (Trim) Ezzy Batten Tension Adjuster Clamcleat CL 250 Gap Closer Patrik SDM Cambers Chinook RDM Boom Shim for Pro Front End Goya Fin Bolt Rubber Washer Streamlined Mast Extension Adjustable Collar And Pin Patrik RDM Cambers Goya Tendon Joint