Humulin 70/30 3ml Penfill (5-pack) is a premixed insulin containing 70% insulin isophane (NPH, intermediate-acting) and 30% insulin regular (short-acting). It is used to manage blood sugar levels in people with diabetes, providing both rapid and prolonged effects. The 3ml cartridges are designed for use with insulin pens, offering a convenient and accurate way to administer insulin. The 5-cartridge pack is ideal for ongoing diabetes management.