The ProFleet Air Spring - Air Bag/Piston Assembly, SKU FI W01 377 8536, enhances suspension performance for Freightliner and other compatible heavy-duty trucks, replacing OEM and aftermarket parts like FI W01 377 8536, W01-358-9781, W01-377-8537, 1R12-603, 910S-16A382, AS-8382, AS-8999, AB1DF23-9781, and 681-320-0017, A16-14004-000, featuring a durable aluminum piston design with specifications including 23-inch extended height, 8.75-inch compressed height, 9-inch top plate width, and 10.62-inch piston width to cushion the chassis from road shock and maintain axle alignment for smoother rides under heavy loads, engineered for easy, direct-fit installation to minimize downtime, and built with high-quality materials to withstand demanding conditions, providing a reliable, OEM-quality solution for truckers and fleet operators when verifying truck model and suspension system compatibility for proper fitment.