Optimal Compatibility: Designed to work seamlessly with both for DISC/DISC and for DISC/DRUM systems, this brake proportioning valve bleeder tool is a perfect match for AC Delco models 172-1353 and 172-1351, as well as for PV2 and for PV4 setups. Construction: Crafted from high-quality materials, this tool ensures reliability and , providing excellent value for automotive professionals and enthusiasts alike. Enhanced Safety and Performance: Properly adjusted brake systems lead to improved vehicle safety and performance, making this tool essential for optimal brake maintenance. Easy to Use: This tool is designed for efficiency, making the bleeding process simpler and more effective, saving time and reducing effort during brake system maintenance. Color:Blue Material:Aluminum Alloy Package Contents: 1 * Brake proportional valve Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.