The Ultra-Fine III pen needles are thin and delicate making injections as comfortable as possible. The Ultra-Fine III pen needles are designed to fit any diabetes pen sold in the U.S. These disposable pen needles can be used without having to pinch-up the skin prior to injection. The needles are safe and reliable making them perfect for use by children and adults alike. The Ultra-Fine III pen needles are available in 4 sizes: Nano, Mini, Short, and Original.