Glass N/A Lobes, lips, septum, and more! Looking to stretch your piercings? Pair these Glass Tri-Colour Spiral Taper 4g-5/8 with our to make sizing up a breeze! Not sure how to stretch safely? Learn more . A taper is a piece of jewelry that expands from your starting size to the next size up. It is extremely important while stretching with tapers to only go up one gauge at a time and wait for one to three months between stretches. Listen to your body: if it hurts you’re going too fast. Additionally, it's also very important that the tapers are smooth and non-porous. For example, any nicks and ridges in the material can harbour bacteria, encouraging infection. Borosilicate glass is glass made of silica and boron oxide. Borosilicate doesn't expand quickly with heat. It also expands evenly, thus reducing the risk of breaking under stress. In other words, this glass is less likely to break when exposed to changes in temperature. After Corning Glass Works introduced Pyrex in 1915, it became a synonym for borosilicate glass. Borosilicate is popular for glassblowing. Artists create a variety of products using borosilicate including jewelry (like these tapers!), kitchenware, and sculptures. Please stretch cartilage (nostril, upper ear piercings, tragus, etc) with tapers. Instead, dermal punch your cartilage for that stretched look. Show us what you chose to stretch with your Glass Tri-Colour Spiral Taper 4g-5/8 with #BodyModsFamous on Instagram. We LOVE seeing our jewelry out in the real world. Finally, don't forget to follow us on and for updates on new jewelry, product info, sales, and more.