New/never used Old Stock. Wilden Air Operated Double Diaphragm 1/4(6mm) vintage pump M. See codes in photo.. Construction = Polypropylene/Brass with Oil Bottle. Ball Valves = BUNA-N. Valve Seats = Polypropylene. This item is in the category “Business, Office & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Diaphragm Pumps”. The seller is “spare_parts4u” and is located in this country: HK. This item can be shipped worldwide.