Johnson Controls A19AAF-21 Temperature Control

Temperature, Mechanical, 24 to 277Vac, SPDT, Automatic Reset, 40 to 90 degree F Setpoint Range, 1.5 degree F Fixed Differential (Close), 6' Capillary Length with 3/8" x 5 3/4" Sensing Bulb, Remote Bulb Temperature Control with Screwdriver Slot Range Adjuster

A19AAF-21 is the direct replacement for A19AGF-23