These replacement Silicone O-rings are used to make the seal between a 9 x 9" Ideal Vacuum Cube plate and frame.

These O-ring seals are installed on the inner sealing groove of the plate. They are made of Silicone and can withstand temperatures between -54°C and 204°C without permanent deformation. Chambers sealed with Silicone O-rings can achieve vacuum in the 10^-8 Torr range (high vacuum).