Tarpsupply 20'x40' Heavy Duty 12 By 12 Cross Weave White Poly Tarp with Grommets Approx Every 18 Inches All Around, Corner Solid Plastic Bar Reinforcement for Extra Strength Finished Size is 19-Feet 4-Inch by 39-Feet 6-Inch UV treated on both sides for superior sunlight protection. Water and Wind Resistant, Rot and Mildew Resistant Double reinforced corners for added strength. Arctic Flexibility 12 x12 Weave; 5 oz/sq yard; 1200 Denier Thick.