The Scotseal PlusXL design with extended life capabilities is the SKF premium performance seal . offering maximum sealing life under virtually all driving conditions. The new high temperature . synthetic lubricant friendly material of the new Scotseal PlusXL . Hydrogenated Nitrile Butadiene Rubber (HNBR) . is an excellent choice for frequent braking applications. HNBR elastomeric material provides heat resistance up to 300 degrees F and broad compatibility with today's synthetic lubrication fluids. The unsurpassed exclusion properties allow the Scotseal PlusXL to perform in very harsh conditions. The new Scotseal PlusXL with the unique hand-installable design includes a fat footprint ensuring stability on the shaft. SKF seals have been on the road for more than a hundred years . keeping lubricants in and contaminants out. All SKF products meet or exceed test requirements to ensure the longest life possible.