The M3 version is offered as a full port in sizes 1/4”-3” threaded end and 3/8”-3” solder end. With Uniseal™ (modified virgin PTFE) seats, we can offer higher operating pressure/temperature limits, with a steam rating of 125 & 150 WSP (over 50 psi steam requires Stainless Steel trim), and temperatures from 0˚F to +400˚F @ 100 psi. Constructed of ASTM B584-C83600 or ASTM B584-C84400 material, the new M3 version of the Contromatics Bronze two-piece contains 25% less lead, has increased mechanical strength and higher melting point.