The CRW1 (fig. 1), CRWH1 (fig. 2), CRWA1 (fig. 3) and CRWHA1 (fig. 4) radial shaft seals, also called SKF Wave seals as part of the CR Seals assortment, are low-friction seals with SKF WAVE lip design for reduced heat generation. For additional information, refer to the sectionSealing lip design. They have a metal outside diameter for easy installation and a firm and accurate fit in the housing bore.