O-ring (washer) is a kind of seals for preventing leaking of liquid and gas. They are in different shapes of cross sections.
One of the specialties of Toos Rubber Industries (S.O.T) is production of different kinds of Oring and washer in various sizes and sections. This company use hot vulcanization process to produce highly stable but flexible products. Different kinds of Oring and washer are as follow:
X-Ring
D-Ring
T-Ring
Square Ring