Enthanate is no different from any oil based injectable . Use a needle to draw18 or 20 Ga . Use 1 needle to inject preferable 22 ga to 25 ga. The higher you go up in sizes , it will be harder to push down on the syringe. I take as long as two minutes to get it all in. Don't be in a hurry. Remember to aspirate ,(pull back too) then let it fly.