Our ground operated manhole covers come in a variety of sizes. Whatever you haul – fly ash, cement, slag lime, frac sand, silica, granular loads – we’ve got a solution. Whether you call them a cover, hatch, lid, dome lid, air hatch or something else, our products will work for you. Our remote controlled pneumatic covers work on your trailer (or silo, or tanker, or anything else you might like to call it).