Rotationally-molded polyethylene with a Pedestrian-rated bolted composite cover. Includes Slick Stick Monitoring CAPACITIES Total - 110 gal. / 14.7 cu. ft. Oil 62.5 gal/ Sand 95 gal DIMENSIONS - L x W x H 68" x 33" x 51-1/2" Weight 225 lbs. Inlet & Outlet 4" plain end Vents 3" plain end