Parts

Sigma Thermostatic Extension Set Long Length 18.30.216

Sigma Thermostatic Extension Set Medium Length (2-3/8" Threaded Tube and 3" Square Tube) 18.12.069

Sigma Thermostatic Extension Set Long Length 18.30.217

Sigma Thermostatic Extension Set Short Length (1-1/2" Threaded Tube and 2-1/4" Square Tube) 18.12.060