Product CatalogueSports and OutdoorsWindsurfing OtherBits and PiecesK4 Fins US Box Blanker Back K4Fins K4 Fins US Box Blanker Product ID: 974814 Brand: K4Fins 2025-03-25 From: $14.99 AUD View or buy the Bits and Pieces Windsurfing Other - K4 Fins US Box Blanker from K4Fins to discover other options and shipping details. Description Blanks off US Box when not in use. 130mm top 9 mm wide 25mm deep Back to Windsurfing Other - Bits and Pieces More Bits and Pieces and others in our range Chinook SDM Mast Extension Cap Chinook RDM Boom Shim for Pro Front End Surf Sail Australia Mini Tuttle Plastic Cover EXOCET EVA Nose Protector Chinook SDM Mast Ferrule Sealing Plug Chinook QR Deck Plate No Hardware Chinook Webbing Tendon Safety Strap Chinook Delrin Washer Channelled Ezzy Split Cam Patrik Metal Camber Spacer