Oil seals, often referred to as shaft seals or rotary seals, play an essential role in various industrial applications. Among the diverse types of oil seals in the market, the oil seal designated as 20% 35% 7% specifically represents a particular sizing and design that can address unique sealing requirements. In this article, we will explore the significance of oil seals, the specific features of the 20% 35% 7% oil seal, and its applications.