Oil-less, diaphragm, lab grade. Vacuum pump KNF NEUBERGER 838.1.2. Great for most demanding applications. Rotary evaporator / vacuum distillation – oxygen concentrator. Transfer of corrosive gases. This item is in the category “Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Diaphragm Pumps”. The seller is “rartec” and is located in this country: PL.