Tractor dump semi-trailer PST-7-1B is designed for transportation of different building and agricultural bulk loads with a density up to 1,15 t/m³ (roots, organic fertilizers etc) with unloading back.

Semi-trailer with additional boards is designed for transportation of light weight bilk loads with a density up to 0,65 t/m³ (grinded green mass - silage, haylage, fresh-cut grass, hay, straw, sawdust, peat and peat chips, wood chips) with unloading back.