This is a Leybold Motor Adapter for Leybold D16B D25B Trivac Rotary Vane Vacuum Pump. This is only one motor adapter, no coupling, no rubber side, no screws are included. Leybold Part Number 20009157. Other vacuum pump parts and accessories sold separately on this website. We also rebuild or repair your leaking or malfunctioning D16B D25B vacuum pump.