insulin pen

1.Material: special European imported environmental protection plastic. 2.High precision injection molding screw; Stable injection; Accuracy error is only 2% 3.Min. dosage 1U, dosage adjustable from 1u~60u. 4.Safe bi-directional dosage adjustment. Device reset automatically and self locking while injection finishes. 5.suitable for both injection needles and injection pens, easy to replace. 6.suitable for 3 ml card bottle potting medicine liquid injection 7.Can be used over 2 years. Easy operation.