Classification by insulin concentration

①U-40：40 units/ml————— red protective cap

②U-100：100 units/ml———— orange protective cap

In domestic market the insulin is usually U-40 while in foreign market both U-40 and U-100 are available.

1. Small needle gauge, less pain, with 28G, 29G, 30G needle

2. Accurate measurement: 0.3ml, 0.5ml, 1ml.