Roller conveyor trailers, colloquially known as unwinders, are mainly used in the waste disposal industry, whether for building rubble, scrap metal or bulky waste. Containers with a length of up to seven metres can be accommodated on the ZPS 180, the maximum payload is 14,800 kg with an empty weight of 3,200 kg. The same payload but more possible volume is offered by the Mega version with twin tyres, which offers a lower loading height due to the 19.5 instead of 22.5 inch wheels.

The unladen weight of the Mega variant is 3,600 kg. The upper side of the two longitudinal beams is designed as a container roller track and is therefore particularly wear-resistant. As with the combination trailer, a pneumatic four-point container lock on the floor also ensures safety on the unwinder. The clamping mechanism fixes the container at four points.