Made with Expertise Built In , the OTR 3030 Type Long Stroke Piggyback Brake Chamber Kit is engineered to deliver high performance power and eliminate downtime. This heavy duty piggyback brake chamber kit features zinc-finished clamp bands for dependable corrosion and pressure protection. This piggyback spring brake chamber kit also includes a diaphragm, nuts, and bolts for mounting. Provide service braking, emergency braking, and parking you can rely on for your heavy duty semi truck needs with this heavy duty long stroke piggyback brake chamber. FleetPride is your First Click in Heavy Duty .