O-Ring for Powervalve Holder $ 3.50 SKU: 93210-34001 O-ring for powervalve holder. Back to: Top End and Crankshaft ×Close NOK NOK is Japan’s first oil seal manufacturer. Their functional parts, such as oil seals and o-rings of advanced technology in processed synthetic rubbers, are used not only in the automotive industry, but also in a wide variety of other industries. http://www.nok.com.sg/index.html Description Will suit all models from 2003 onwards using the rotary drum powervalve.