in the chemistry i bought really cheap hypo for insulin treatment, usually 0,3mm.
i cut then with a normal modeller blade,only be carefull to put your fingers in every side, wen it get cut they jump, and is imposible to find them in floor.
the muzzles i drill them, one piece of 0,6mm of diameter 1,5 mm long atached to a 0,3 drill that is inside of another piece of, 0,8, i will try to made a diagram
here are the pictures and the photo of the neddles,they go in a colour code and can be found in internet,the only problem is that they sell 100 units per box

By ljeronimo at 2009-09-26

By ljeronimo at 2009-09-26