Dynarex Hypodermic Needles are thin-walled and sharp to lessen the sting of injections. All needles have a color-coded hub to represent the gauge of the needle and attach to the syringe by either a luer lock or luer slip connection. The needles feature a double bevel for ease of penetration while helping larger doses flow smoothly.We directly source prescription medications from manufacturers and wholesale distributors registered with the FDA and licensed by applicable state boards. Guaranteed genuine, and where applicable, backed by the manufacturer.