Do your self a favor and go to your local WalMart pharmacy and ask for insulin syringes. Or buy the 25G 1/2 syringes that you can use on quads, delts ( butt not glutes, no pun intended)
Insulin syringes cost all of about 8 cents a piece and you can by them over the counter, no prescription required. You will appreciate the lack of pain of injecting subcutaneously as the above youtube video from endocrinologist Dr. John Crisler demonstrates.
I have used 23G 1 1/2 on glutes and it's like going in butter. Never used the larger 22G and certainly would not want to put that in my quad now that I am in the know about scar tissue, much less the pain.