Straight internally threaded barbell shafts in sizes from 16g to 8g, made of implant-grade stainless steel (ASTM F-138 316LVM) polished to a mirror finish.  Ends must be purchased separately. This style of jewelry is used in so many different piercings that we offer it in over 100 unique sizes! If you’re looking for straight threaded barbell shafts in sizes 6g to 00g, shop here. These straight barbell shafts are internally threaded and work only with threaded, screw-on ends made to fit the same gauge. Threaded ends and shafts are sold separately. If you’re looking for a complete piece of jewelry, make sure to purchase corresponding threaded ends for your straight barbell shaft.