Optiparts Optimist Daggerboard Protection Kit – A complete kit for protecting your valuable Optiparts Optimist Daggerboard.Kit Includes4 rubber insertsAdhesiveSandpaper4 self-adhesive glide strips (300 mm x 18 mm x 1.0 mm each)These strips can be stuck to the top and the bottom of the case and minimize play and friction between the daggerboard and its case.