The Accutube Series 24D Standard Probe is constructed of 316LSS probe and 316SS flange. The instrument flange is 1 1/4" 150# ANSI flange standard (2 3/8" probe has 2 1/2" 150# flange.) The Series 24D probe is single-mount supported and installs through a carbon steel mounting flange and welsolet. The Series 24D Accutube is factory-fitted with mounting hardware coomplete. Series 24D Accutubes are available for line sizes 2" through 72".