American Standard Temperature Calibration Unit, For Use With: R510/R520/R530 Series Central Thermostat With Volume Control, Metal, Import
Domestic/Import : ImportMaterial : MetalSuitable For Use With : R510/R520/R530 Series Central Thermostat With Volume Control
Durable metal construction for long lasting qualityReliable performanceEasy installationFor use with thermostatic valves - check your specific model for compatibility