Today's insulin needle is thinner and more delicate for greater comfort, so needle reuse can damage the tip and cause injury. U-100 Insulin. 28 Gauge x 1/2 in. needle. For 100 units or less. This products does not contain natural rubber latex. No Dead Space, more accurate dosage. Less insulin waste. Flat-Faced, Thin-Line Plunger Tip: Lines up precisely with scale markings for accurate reading. Superbly Lubricated: Special-formula lubricant Micro-Bonded for more comfortable injection. Smooth Tapered Syringe Tip: for greater comfort. Large Numbers: Clear, bold, easy to see for greater accuracy. Protective Needle Shield and Plunger Cap: Safeguard sterility of syringe fluid path unless the syringe is open or damaged. Orange syringe needle shield identifies syringe for U-100 insulin concentration. Non-Toxic, Non-Pyrogenic. Made in USA.