Key Information: ‣ Size: 32G x 4mm ‣ Uses: Ultra-thin needle designed for comfortable and precise insulin injections. Compatible with most insulin pens. ‣ Directions: Attach the needle to the insulin pen, inject the required dose, and dispose of the needle after use. ‣ Warnings & Precautions: Single-use only. Properly dispose of needles in a sharps container.