Manufacturer: Nordisk Novolin Flexpen N is pre-filled with insulin and helps to improve glycemic control in adults and pediatric patients with diabetes mellitus. The pen is color-coded for easy identification. Doses are provided in one-unit increments for insulin medicines. Combination isophane/regular insulin. This man-made insulin product is the same as human insulin. Replacing the insulin that the body would normally make. Read the patient Information Pamphlet before use. NOTE: We recommend that all insulin products should be shipped Next Business Day. Free shipping on orders over $100 is for Standard shipping only.