For sale is a Milton Roy Model RA10 Hydraulically Actuated, Controlled Volume Diaphragm Pump. 1/4 HP 1/60/115/208-230V AC Motor. 6.2 GPH / 100 PSI. 5.7 GPH / 350 PSI. Pumping volume is adjustable from 0 to 100 percent of rated throughput, and can be adjusted while pump is stationary or operating. This unit is tagged: 1015A1SESEM2NN. There is a tag on this pump that says: PUMP REPLACED, ADD OIL. The bolt holes do not look like the pump was ever mounted. My best guess is that they replaced the pump and never mounted it.