Seals play a decisive role in protecting bearings against contamination. If inadequate seals are used, contaminants can penetrate the bearing or an unacceptably large quantity of lubricant may escape from the bearing. Solid contaminants lead to wear and/or fatigue of the raceways and rolling elements. Bearings that are contaminated or running dry will fail long before they reach their fatigue rating life. In the design of bearing arrangements, the use of the correct seals is therefore decisive in determining the operating life of the bearings and the cost-effectiveness of the bearing arrangement. Specifications Measurement Unit: Metric Material: Nitrile Rubber (NBR) Inside Diameter: 12.00mm Outside Diameter: 18.00mm Width: 3.00mm Lip Style: G - Low Cross Section