Product CatalogueSports and OutdoorsWindsurfing OtherBits and PiecesK4 Fins US Box Blanker Back K4Fins K4 Fins US Box Blanker Product ID: 974814 Brand: K4Fins 2025-06-01 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 Goya Adjustable Collar And Pin For RDM Extension Chinook SDM Mast Extension Cap K4 Fins Mini Tuttle Box Blanker BLACK K4 Fins Slot Box Box Blanker 90mm Dynafiber Rubber Power Joint Boge 10mm Surf Sail Australia Mini Tuttle Plastic Cover With Screw Ezzy Batten Tension Adjuster Chinook QR Deck Plate Chinook 4 mm Prestretch Rope Streamlined Tendon Joint