Novofine Flexpen Needles are high-quality insulin pen needles designed for comfortable and reliable insulin delivery. Each box contains 100 sterile 6mm needles that are compatible with standard insulin pens. Since this is a medical device for insulin delivery, specific usage instructions should be obtained from your healthcare provider. The needles are individually packaged to maintain sterility. Always use a new needle for each injection and dispose of used needles properly in a sharps container.