SecureSafe? Safety Hypodermic Needle 21G, 1 1/2" Needle The thin wall needles have a double bevel, allowing for ease of penetration while helping larger doses flow smoothly. The SecureSafe safety mechanism features a quick cover that enables the user to cover and protect the needle with a press and snap. SecureSafe safety mechanism has a quick-cover that allows you to easily cover and protect the needle with a press and snap, protecting against accidental needlestick Color-coded needle hub for quick identification of the needle gauge Compatible with Luer lock and Luer slip syringes Not made with natural rubber latex