Monoject Ultra Comfort U-100 Insulin Syringes - 29 Gauge 3/10cc 1/2inch (12.7 mm) needle, 100 single use syringes. (Case of 3 Boxes). For 30 units or less. You should consult with your health care professional before using this product. Every Monoject Ultra Comfort Insulin Syringe has been engineered to provide you with unparalleled comfort, accuracy and ease. Half Unit Markings for precise dosing!