Many customers use 16x18 tarps to cover boats, ATV's and other motorized vehicles during the off-season. These 16 by 18 tarps include grommets spaced approximately every 18 inches on all four sides for maximum efficiency and convenience. You have a choice of many colors so you can blend the 16 x 18 tarp in with the color of your home, garage or temporary structure. These tarps are made with an inner weave that is classified as heavy-duty due to its dense mesh (weave) count and 12mil thickness, 6oz. per sq. yard (1200 Denier) weight. The heavy-duty polyethylene is laminated and treated for waterproofing, rot-proofing and UV-protection.