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valleyhammer6518.27RP
This is honestly very easy! I use syringes with screw-on needles. The syringes I like are from Exelint, and the screw-on needles are from Care Touch. I buy a box of 100, 22g 1.5" syringes and a box of 100, 23g 1.5" screw-on needles. I draw my oil from the vial with the 22g syringe, then I remove that needle and attach a 23g one. Now I have a clean, sterile needle for my glutes. I also get a box of 25g 1.25" needles for my deltoids. Unless you're using insulin pins, then you'd probably have to draw with one needle and use it to fill a new one, but I don't do that.