The CR Scotseal X-Treme seal offers exceptional performance in virtually all operating conditions. It’s a unitized, one-piece hand installable seal that has three metal unitizer rings for damage free installation. This seal uses an advanced HNBRX material that provides low friction, excellent high heat capability, outstanding wear resistance, and broad compatibility with synthetic lubricants. Its low friction and high rolling efficiency provides improved fuel economy and lower emissions. Ideal for flees looking for maximum uptime, lowest cost per mile and the Best Seal Designed for Heavy Duty Operations.