Check the listing for details. Pro-par OEM Slack Adjuster P/N: PROSA1140. Condition: New other (see details). Listed at 85.00 USD. The Pro-Par OEM Slack Adjuster P/N: PROSA1140 is a high-quality automatic slack adjuster designed for commercial trucks. Made by the reputable brand Pro-Par, this unit is a crucial component for maintaining optimal brake performance on the road. With a units quantity of 1, this product is a reliable choice for those seeking a durable and effective solution for their truck's braking needs. While it does not come with a warranty, the Pro-Par OEM Slack Adjuster is a trusted option for those in need of this essential part for their vehicle.