These new Leybold 1st stage stators are for the Leybold D25B Trivac rotary vane dual stage mechanical vacuum pumps. We have included the exploded parts views for download below for your reference. This is the sator only. Other vacuum pump parts and accessories sold separately on this website. We also rebuild or repair your leaking or malfunctioning D25B vacuum pump. Leybold Part Number PL23192017PP