tod,
you mention syringes.
Let me tell you whether it is cath tip, luer lock, it does not matter in the long run.
For the most part, depending on cycles of use, the little black stopper and the plastic in them get affected and will "stick" and soften badly. Great for single use, or several uses in a period of time, but if you try to "save" them for over 6 months and don't use them regularly, you will be disappointed. I use them with a bent 16 g. needle for my trim tilt on my wife's ski boat since the pump is on the transom in a very difficult position, and if I try to save them past about 6 months I am usually regretting it. They work, just know they have limited life and get a bunch.
Work well for small amounts of epoxy too...