This Exel International 26004 Needle is a 31G X 1/4in. Regular Wall needle. Regular wall needles are more rigid than thin wall needles, providing extra support and less flex due to added annula thickness.
This is a pen needle. Every pen will need a new pen needle for each injection. Non-sterile This product must be used for educational, training, or non-clinical research purposes only. We are not responsible for any injuries that result from improper use of the product.