Thanks for this post - I just got a 50 pack of pins -- 22g needle and 1cc tubes-/ the tubes are the size of slin pins- the needles are 1 inch and 22g. I've never used this type of tube for IM injections - I've always had the larger tubes. I should be good , right? Only doing 1ml jabs at a time in delts most likely- the needle seems to be long enough and thick enough for an IM - my only concern was the skinnier tube - doesn't matter, right?