The sealing ring fits Zetor 40x72x12 ORIGINAL URSUSThe sealing ring (simering) of the Ursus brand is a product made of a special mixture of acrylonitrile-butadiene rubber, the advantage of which is increased resistance to greases, oils and fuels. Ursus sealants guarantee full tightness of systems in the temperature range from -30°C to +100°C, and have a 24-month warranty.