Sigma 9/16" Threaded Extension Tube 18.30.065
Sigma Thermostatic Extension Set Short Length (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
