Mastercool is the leading manufacturer of professional quality A/C manifold gauge sets. Our manifold gauge sets are constructed of the finest materials and machined with precision to the highest quality standards. At Mastercool, every manifold we build is built to last. This kit includes a professional extruded aluminum block, silicone dampened, recalibrateable gauges, 3 - 60" hoses, professional R134a couplers and includes a free (85530) 3-IN-1 side mount can tap valve.