Hexagonal Brass Hand Pump Plunger, Inner Diameter: 0 mm at best price... Specifications: Item:-Hand Operated Drum Pump Action Type:-Plunger UNSPSC:-40151529 BRX3 Pneumatically Driven Chemical Injection Pump - Bruin Pumps Red Head Hand Operated Plunger - Bp-10 Replacement RED HEAD Hand Dust Blow Pump, Plunger - 15X682|BP-10 Drum Pump Cantex 1-1/2 in. D PVC Electrical Conduit Elbow