The Stark A/C Diagnostic Manifold Gauge Set is designed for accurate and efficient system testing across R404a, R410a, and R22 refrigerants. Featuring easy-to-read gauges with 3 PSI scales and Celsius temperature readings, this tool ensures precise pressure measurement for HVAC maintenance and repair.Constructed with a heavy-duty brass manifold body, it offers long-lasting durability while remaining lightweight for easy handling. The built-in sight glass allows instant visual inspection of refrigerant flow, making it simple to identify when charging or recovery is needed.Silicone-damped gauges reduce wear and vibration damage, while clear adjustment plugs enable fine-tuning for long-term calibration. Designed to meet 1/2 in. SAE standards, this professional-grade manifold gauge set is ideal for servicing air conditioning and refrigeration systems efficiently and reliably.