89661-PRO R134A Manifold Gauge Set with Aluminum Standard Couplers, Blue. The Mastercool R134a Aluminum Manifold Gauge Set features: a set of three SAE approved nylon barrier hoses, professional extruded aluminum block, silicone dampened gauges, professional R134a manual couplers and includes manual couplers and 60 inch hoses. We offer the best prices around on high quality products. Our E-store includes media such as books, movies, music and games while offering electronics, toys, sporting apparel, clothing, tools, general home, garden items and more. We are always working hard to ensure your package arrives as soon as possible.We do not accept P. Please provide a physical address. We try our very best to make sure every customer is completely satisfied. If there's a problem, message us! We're happy to help.