Uniweld Q4N8 4-Valve Aluminum Manifold features an anodized aluminum block body with 4 ports for charging, evacuating, and testing a system without changing or removing hoses. The 3/8” SAE port increases vacuum capacity and saves time. The convenient optical sight glass allows for refrigerant monitoring and the durable, brazed brass T-handles provide smooth, precise adjustments. It has easy to read 3 1/8” NPF gauges with 4 refrigerants (R-410A, R-22, R-404A, R-134a) that are protected by color coded gauge boots. Replacement gauges are available under Part# G429ND for RED and Part#G430ND for BLUE.