Extendable three-axle semi-trailer PPRS48 with a gross weight of 48 tons, designed for the company STSI. The semi-trailer is primarily intended for the transport of pipes and poles. The loading area is 13350 mm long, with a telescopic extension of up to 4000 mm, increasing the total length to 17350 mm. The loading width is 2540 mm, but it can be extended to 3050 mm. Along the outer edges of the platform, pipe support brackets serve as stoppers for secure pipe transport. The front wall of the semi-trailer features a removable toolbox, and the front section also includes holders for pipe storage.

STSI d.o.o. is a company specializing in maintenance and construction of industrial facilities. Established in 2002 following its separation from INA, STSI focuses on the maintenance and construction of oil and gas production and processing plants, from drilling sites to refineries. Additionally, the company is engaged in projects within the petrochemical industry and other construction sectors. As the largest maintenance company in Croatia, STSI provides comprehensive maintenance services across multiple disciplines, including mechanical, electrical-instrumentation, and civil engineering.