TweetThe slin i am using has a really nice stopper so I can get a draw and 2 pokes from 1 slin pin. With generic GH the stopper is thicker so I can get a draw and 1 poke from 1 slin pin. If for whatever reason the needle is too dull I will backload a fresh slin pin. This is what works for me. I know plenty of guys that will fill the whole slin pin and do like 5 or more pokes with it to save money on syringes. However it is recommended one needle, one poke for many reasons.