Not all gasket material is the same! Use this premium gasket cord with the entire SmartVac 3 product line. This vacuum gasket cord is specifically designed to be use for vacuum workholding applications and is formulated to be oil and coolant compatible. It is soft and easily compresses into grooves unlike O-rings. Sold in 50 foot lengths. The 1/8" is a nominal size. Gasket typically ranges in size of .120"-.145" -Smooth surface with closed cell construction conforms to uneven parts and textures -Chemical resistant -Coolant compatible -Gasket compresses when placed in an appropriately sized gasket groove