The Meritor R824003 1.5" 28 Spline Manual Slack Adjuster is a new old stock product designed for commercial trucks. Specifically, it is a manual slack adjuster made by the reputable brand Meritor. This accessory is essential for maintaining proper brake performance and ensuring smooth braking on the road. With its durable construction and precise design, the Meritor Manual Slack Adjuster is a reliable component for any commercial truck fleet.