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I use this for measuring smaller amounts so yes, they're reusable and can last a long time. If using for medical purposes on different individuals, then no doscard after one use. But if you just use it for yourself to measure small amounts of liquid, then they're great and really can be used for quite a while without discarding them.
These are as described. I use these for my dog as im juicing vegetables for her daily, so i reuse these syringes. It says one use only. I used one for about Two weeks and then it started getting hard to push the juice out. Happy with the purchase.
I bought the 3ml syringes primarily to load lotions, etc., into small tubes for ease in carrying around. They work well; the syringe tip fits into the mouth of the tube. BUT: two things to be aware of, which is the reason for only 4 stars. (1) There is a collar around the syringe tip, which makes it messy to dip into a liquid and draw it up, and may prevent the tip from going into the tube mouth. I solved this by carefully cutting off the collar with my trusty Dremel Moto-Tool. (2) The plunger cannot be removed from the syringe, which can make it difficult to clean the syringe to use again.