The BA shaft seal is made entirely of NBR elastomer on the outside, with a sealing lip (without dust lip). The standard shaft seals are made of acrylonitrile butadiene rubber (NBR) and are suitable for temperatures from - 40°C. to + 100° C. (short-term up to + 120°C.) suitable. The most common shaft seals are standardized in Germany in DIN standard 3760. Please ask for larger quantities.