Single-use blood collection needles of 20G, 21G, 22G and 23G are available for your selection. Venipuncturing end of the needles are designed sharply and treated with silicone, making the venipuncutring even no pain. Unique design makes blood flow can be seen through needle, thus time for puncturing vein to collect bood is shortened. Sharpness, safety, rapidness are just what you want.