... /57 Application in truck,heavy-duty truck,trailer,specail-purpose vehicle,etc. Com spring brake chamberTYPE: 16/16STROKE: 57/57PORT ... wheel.We offer a comprehensive range including Brake Chambers, Spring Brakes (in diaphragm/piston or double diaphragm configuration), and ... foot brake valve, relay valve, air dryer, clutch servo, trailer valve, unloader valve, protection valve, etc.., which applied to ...