Lincoln 2537 Stationary Motor Oil Pump Assembly for 16 gallon drums includes the Series 40 5:1 Motor Oil Pump, 2" Bung Bushing, volume union Elbow, air Coupler & Nipple, LIN-73060 fluid connecting Hose and LIN-72060 air Hose. If Drum Cover is desired, order LIN-81523 separetly.