A straight barbell is most popularly used in tongue piercings. 14 Ga is the most common gauge used for tongue ring piercing. In order to accommodate the swelling, the initial length of the pierced body jewelry should be at least 3/4". When the tongue rings piercing has become well, it can be changed to a shorter barbell of 9/16", or 14 mm, which is the most usual size of tongue rings. It is recommended to wear a shorter barbell after the tongue piercing is healed.<br /><br />Barbell tongue ring style of body jewelry is made of a straight bar and with a bead on each end, one or both beads unscrewable for replacement and/or changing of the beads. Either through epoxy or welding, often one of the beads is fixed, so that only one bead is used to install or remove the jewelry. Barbell threads are mostly right-handed.<br /><br />There are roughly about 5 kinds of barbells for body jewelry. The internally threaded barbells are slightly more expensive than externally threaded barbells as there will be additional machining and labor included. It is also considered superior to the external barbells as it is less likely to cause damage or irritation especially at the time of piercing. An internally threaded barbell has a bead with a receiving tube machine into it which connects with a threaded post extending from the center.<br /><br />Although the externally threaded barbells have become less common, the internally threaded barbells have increased in popularity. It is named so because shaft of the bar has threads at both ends to permit beads with receiving threads to be attached. <br /><br />Named because of the curvature, curved barbells can also be known as a navel curve. It is mechanically identical to straight barbells except that they are curved. Curvature on a curved barbell tongue rings can range from about straight to circular, with some barbells basically being spiral, with the ends overlapping but departed to permit the insertion of the body jewelry. A variation on the curved barbell tongue ring design is a slightly curved barbell with a 90 degree bend near one end which is used in vertical navel piercings so the decorative end of the body jewelry is positioned more appropriately is called a J-bar. They can be either internally threaded or externally<br />threaded.<br />Circular barbell <a href="http://www.bodybling.net/tongue-rings-c-65.html" target='_blank'>tongue rings</a>, also known as horseshoe barbell tongue rings are used in some kinds of piercings. Their shape is what gives them their name.<br /><br />In all surface piercings, surface bars are used. Barbells for surface piercing have a pair of 90 degree bends in the same direction, so they can be used for surface piercing. Because of this design the pressure that would be caused by other <a href="http://www.bodybling.net/" target='_blank'>body jewelry</a> designs that interfere with the healing is minimized.<br />
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