The Meritor R955300NX is an Exchange (XCH) SS1200 Dry Brake unit sold by Pro Gear and Transmission. The SS1200 designation identifies this as a Meritor SS1200-series dry brake component supplied on a service exchange basis. If you need to verify proper fitment for your specific vehicle or brake configuration, call us directly and we can help confirm the right part for your application.A refundable core charge of $100.00 applies to this item and will be collected at checkout. The core charge is refunded upon receipt of your returned core, subject to its condition; customer is responsible for return shipping. Call us at (877) 776-4600 for details.FeaturesMeritor part number R955300NXSS1200 series dry brake unitSupplied as a service exchange (XCH) unitGenuine Meritor brake componentSold by Pro Gear and Transmission