The Meritor R824004 1.5" 28 Spline Manual Slack Adjuster is a high-quality replacement part designed for various HD models. As a genuine Meritor product, you can trust in its durability and performance. With a 28 spline design and 1.5" diameter, this manual slack adjuster ensures smooth and precise braking adjustments for your commercial truck. Whether you are looking to replace a worn-out adjuster or upgrade to a more reliable option, this Meritor product is a great choice for your braking needs.