Pen Needles
The length and gauge of insulin pen needles range from 4 to 12 mm and 29 to 32 gauge, respectively. The Pen Needle is shorter and thinner depending on the millimeter count and gauge, respectively. Human skin is typically 1.6 to 2.5 mm thick, therefore a 4 mm needle can readily penetrate the skin's top layer. The nano 4 mm, 32 gauge needle, which is about the thickness of two strands of hair, is the tiniest and thinnest needle available. The gauge of the 6 mm tiny needle is often 31 or 32, making it just as thin as the 4 mm alternative.
Read More- https://cmiblogdailydose.blogspot.com/2022/12/pen-needles-used-to-offer-insulin-into.html
