This base gasket is intended for a brass and Sifoblic siphon (oblique) for washbasin. It allows a perfect seal at the connection of the base to the body of the trap. Its outer diameter of 48.8 mm and inner diameter of 42 mm, for a total thickness of 2 mm. Flexible, it is easy to install.
In black elastomer, this flat seal is sold in sets of 25 units. This spare part does not require any particular maintenance.