Our silicone nose pads are made of super-soft and pure silicones which don’t contain phthalates, lead or vinyl and all that stuff. Meanwhile, silicone nose pads are flexible and comfortable to touch skin with allergy-free. Transparent smooth nose pad proves to be excellent quality. They can be used for long time and won’t be flavescent on the surface. Easy to clean with a little water and liquid soap Symmetrical teardrop shape can be mounted either left or right side. Screw fit and snap fit are available with 5 sizes in length separately. Length is: 11mm, 13mm, 15mm, 17mm, and 19mm.