Silicon Gasket & Ring SKU: Silicon Gasket & Ring Dia of rings available with us 1.5"Ø, 2"Ø, 2.5"Ø, 3"Ø, 3.5"Ø, 4"Ø, 5"Ø. We also have some of the odd sizes and also make as per customers requirement. The rubber used are the finest and long lasting..