Rotationally-molded polyethylene with a Pedestrian-rated bolted composite cover. CAPACITIES Total - 750 gal. / 100 cu. ft. Oil 323 gal/ Sand 295 gal DIMENSIONS - L x W x H 105" x 56" x 65" Weight 1253 lbs. Inlet & Outlet 4", 6" or 8" plain end connection options