The Septum Piercing is the cartilaginous dividing wall between the nostrils. The cartilage itself is not pierced, but rather the small gap between the cartilage and the bottom of the nose (sometimes called the "sweet spot"), typically at 14ga (1.6mm) although it is often stretched to a larger size. This piercing heals within a month depending on the individual. It should only be stretched by 1mm at a time, and waiting at least two montha between stretches is advisable. Many types of jewelry generally are worn in a septum piercing, such as captive bead rings, rings that close with a bead held in the center by the tension of the ring, circular barbells, a circular bar with a bead that screws onto either end, a "tusk" that is a straight or shaped piece of material generally tapered on either end, or pinchers. For large gauge septums, many individuals choose to wear plugs, as the plugs do not weigh their noses down, which is helpful in healing. Another option is a septum retainer, which is staple-shaped. This type of nose piercing is particularly easy to hide when desired, for example to comply with a dress code. A septum retainer makes possible turning the jewelry up into the nose, thus concealing it. With black jewelry flipped up into the nostrils, this piercing can be made practically invisible. A circular barbell can also be hidden by pushing it to the back into the nose.