I like 3cc syringes; i like using 23g, 1 1/2" needles..I like 2 needles per injection..I use one needle to load the syringe and one to inject. I don't like leaving this used stuff around, so into the Clorox container it goes after each injection. I use a new syringe and new needles each time. Never had a problem and the syringes and needles are cheap enough.