Sigma Thermostatic Extension Set (1-1/2" Threaded Tube and 2-1/4" Square Tube) 18.12.060
Sigma Brass Stem and All-thread 20 Point 18.30.119
Sigma Brass Stem and All-thread 16 Point 18.30.122
Sigma Brass Stem and All-thread 20 Point 18.30.123
