Stelpro 24V Low Voltage Electromechanical Relay w/o Transformer, External Input Features:

• Has a 1 year limited time warranty.
• Up to 6000W at 347V.
• Compatible with T822K1032, T87K1015 and ET180 thermostats.
• Do not install more than four relays without a transformer to the same thermostat.
• You cannot connect relays to the same control circuit as a relay with a transformer.
• Installation: relays can be installed in an external junction box.
• These relays may or may not be installed in the junction box of the heating unit.
• Certifications: cUL/UL Listed.
• Dimensions: 3.94-in (L) x 2.66-in (W) x 1.63-in (H).