Refrigerating Pressure Gauge : (1)Diameter:1-1/2", 2", 2-1/ ... " (2)Case & cover: SS304, Steel (3)Accuracy: 3-2-3% Refrigerating Pressure Gauge(1)Diameter: 1-1/2", 2", 2-1 ... ammonia, used in, air-conditioning, refrigeratorCustomers brands and logos accepted. Refrigerating Pressure Gauge