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These look just like the pumps I got from Mac’s this week. Even the etching or marking of some numbers that is the dark spot. Mine came in a white box but the gaskets were in a ziplock that similar to what is shown. First observation is that the sand casting texture is rough not smooth. Also the shaft looks small, it’s hard to measure accurately because of the bevel, but could be smaller than 1/2” by as much as .040?
I was quite impressed with the last pumps I got from Speedway,I.e. smooth casting,large shaft diameter (5/8”), and machined hose connections.