EHEIM swing arm cpl. 50 Hz for EHEIM air 100/200/400

A complete swing arm assembly designed as an original replacement part for the EHEIM air aquarium air pumps — specifically models Air 100, Air 200, and Air 400 operating at 50 Hz. This component is listed under EHEIM spare part code 7619788 and is part of the internal diaphragm/vibration mechanism that drives air production.