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I use the AMSOIL Hand pumps which are very nice. While I may be biased, I've used a lot of the ones you can buy at the local auto store and they usually leak, don't fit the bottle, or break. The AMSOIL hand pumps seem to be of a higher quality and have a higher fluid output per pump rate. But I have one used them for one diff change at this point so can comment personally on longevity yet.
Type G2039 into the search bar in the AMSOIL Online Store and click on the enter button.