Greiner safety blood collection needles Butterfly for blood drawing with retractable safety mechanism 21G x 3/4" x 12" 21 gauge needle thickness, 3/4" needle length, 12" tubing and luer adapter 23G x 3/4" x 12" 23 gauge needle thickness, 3/4" needle length, 12" tubing and luer adapter 25G x 3/4" x 12" 25 gauge needle thickness, 3/4" needle length, 12" tubing and luer adapter Sterile Items will be shipped once order is placed. **Puerto Rico, Virgin Islands, and Guam are not included in free shipping