The DuraClass HPT line of tub bodies includes the HPT-B1 and HPT-B2 models. The HPT-BI offers a closed fender design and comes in 14' to 18' lengths in either carbon steel or stainless steel. It has capacity ranges from 10 to 20 yards. The HPT-B2 has an open fender design, which decreases the possible areas for rust and the overall body weight. The body comes in 10' and 11' lengths in 3/16" carbon steel, and 14' to 18' lengths in 3/16" carbon steel. The HPT-B2 also has an option for stainless steel. The tub bodies have a semi-elliptical body, a cross-memberless understructure and a body sidewall to improve its payload-to-weight ratio.