This is our COMBO Style 30 x 30 Machinery Tarp, with 3 rows of D-rings on all 4 sides spaced apart at 2.5', 5.0' and 7.5' from the edge. Webbing and grommets will be located on all edges. 15 x 15 middle area will be made of 18 ounce vinyl with 100% Cordura nylon sides.