Boat Trailer 1-3/4" Bunk Slick KitFeatures: Bolts directly onto carpeted bunk boards; Fits 2x4 standard bunk boards; Slide on or off with less effort; Easy to install; 8 Pieces 1 3/4" X 17"; Bunk Slicks Installation Instructions for #86170 and #86164 With the boat on the trailer, determine the forward most point where the boat makes contact with the bunks. ; Unload boat from the trailer. ; Place Bunk Slick centered on the rear end of bunk so that the bunk slick is even with the end of the carpeted bunk. ; Space Bunk Slicks on carpeted bunk and space evenly with no more than 4 inches between each Bunk Slick. ; Area to be "covered" is from the rear end of the carpeted bunk to 5 inches past the most forward point where the boat hull comes in contact with the carpeted bunk (below). ; Using the screws provided, attached the Bunk Slicks to the carpeted bunks.;