Sweat Fitting Coupling, Application Air, Gases, Potable Water, Fitting Side A Connection Type Cup, Fitting Side B Connection Type Cup, Fitting Side A Copper Tube Size 1 1/4 in, Fitting Side B Copper Tube Size 3/4 in, Fitting Material Wrot Copper, Fitting Side A Tube Outer Diameter 1 3/8 in, Fitting Side B Tube Outer Diameter 7/8 in, Maximum Operating Pressure 439 psi @ 100 Degrees F, Maximum Operating Temperature 400 Degrees F, Specific Fitting Shape Straight Reducing Coupling