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You can get 1ml insulin syringes at kroger or any drug store. They're 29 guage, so you can't draw with 'em. You can, however, remove the plunger and fill the case with another bigger needle, then squirt out a measured ammount.
Ohterwise, if you're using 23 guage needles, at room temp, 13 drops = .5 mg.
hope this helps,
GJ