GBK Type 20 Service Brake Chamber - Professional Grade Replacement Upgrade your commercial vehicle's braking system with the GBK Type 20 Service Brake Chamber. Engineered for reliability and performance, this brake chamber features a 2.25" standard stroke design that delivers consistent braking power for semi trucks, trailers, and heavy-duty commercial vehicles. Key Specifications: - Stroke Length: 2.25 inches (standard) - Chamber Diameter: 6 inches - Port Size: 3/8 inch - Mounting Center: 8 inches - Pushrod Thread: 5/8"-18 Universal - Material: Black Powder-Coated Steel with Clevis - Includes: Detachable Clevis with Two Pin Holes and Complete Mounting Hardware Direct OEM Replacement: This brake chamber is designed as a direct replacement for PAT-20, Bendix 800824, Haldex SC20, MGM 30/30, Automann 170.286803, and Dayton 12-286803. No modifications required - simply remove the old chamber and install this unit using the included hardware. Superior Construction: Manufactured from high-quality black powder-coated steel, this brake chamber offers exceptional durability and corrosion resistance. The powder coating protects against rust, road salt, and harsh weather conditions, ensuring long-lasting performance in demanding environments. Complete Package: Each 4-pack includes four Type 20 brake chambers with detachable clevis featuring two pin holes for flexible mounting options, plus all necessary mounting hardware for professional installation. Ideal for fleet maintenance operations, repair shops, and owner-operators who demand reliable, cost-effective brake components. Trust GBK for quality brake chambers that meet or exceed OEM specifications.