SKF CR39935 Single Lip Silicone Rotary Shaft Seal 4x4.999x0.438 inch

SKF CRWH1 Silicone Oil Seals: These radial shaft seals have Waveseal lip design to reduce friction and heat generation. The seals have a double steel shell to simplify installation and provide a tight fit in the housing bore. The outside diameter of the seals is coated with Bore-Tite, a non-hardening, water-based polyacrylate sealant, which enables the seals to accommodate small imperfections in the housing bore. This seal also has a carbon steel garter spring. These seals are primarily designed for lubricant retention.
Benefits: Reduced friction and heat generation, provides a tight fit in the housing bore, accommodates small imperfections in the housing bore