Accu-Fine 4mm Insulin Pen Needles are sterile needles specifically designed for use with insulin pens. These 32G (0.23mm) x 4mm needles provide a comfortable injection experience with their ultra-thin design and precise engineering for optimal insulin delivery. As this is a medical device for insulin delivery, it should only be used as directed by healthcare professionals. Each needle is sterile and intended for single use only. The 4mm length and 32G thickness are designed to enable comfortable subcutaneous insulin injection while minimizing the risk of intramuscular injection. Compatible with most insulin pen devices.