Dispovan Pen Needles 5mm 31G is a pack of 10 disposable needle tips for use with insulin pens. These needle tips are used to inject insulin into the body, and are a common method of delivery for individuals with diabetes. The needle length of 5mm and gauge size of 31G indicate that these needle tips are short and thin, providing a less painful injection experience. They are designed for single use only to prevent contamination and ensure safety. Individuals using insulin pens should follow their healthcare provider’s instructions for proper use, disposal, and care of their insulin delivery equipment.