The flat-sealing plug-in coupling QRC-BP from STAUFF is a real "specialist" in the coupling range, as it was developed for the standard-compliant connection of detachable lines in hydraulic brake systems of agricultural machinery. This coupling is only available in a nominal size of DN 12.5 and is for operating pressures up to 150 bar. The coupling is easy and safe to operate. When coupling and uncoupling, the operator only has to pull back the sliding sleeve. Precision balls are used in the locking system.