No more ripping up the plywood on your trailer. Allows skis to glide with ease. Traction knobs incorporated for better traction. Exclusive venting, protects the deck of your trailer from moisture damage. Total length of 20' (6 m). Each box contains 8 pieces 8.5" x 29.5" (21.5 cm x 74.9 cm). Comes with 48 specially coated screws with grommets. -