Shop used Wabco Double Diaphragm Tristop 30/30 Brake Actuators / Chambers on MyLittleSalesman.com . Compare active listings with prices from $78 to $112. Sellers include Frontier Truck Parts. Filter by condition, price, or year to find the Wabco Double Diaphragm Tristop 30/30 Brake Actuator / Chamber that fits your job.