Brake Proportioning Valve Bleeder Tool, Brake Bleeding Tool for DISC/DISC & Disc/Drum PV2 PV4, AC 172-1353 and 172-1371, Compatible with Non-Adjustable Combination Valves (Blue) Color: Blue Practical Function The proportioning valve precisely fits valve interfaces via a unique thread design, securely locking low-pressure shut-off valves.
