XL Reducer, Application Potable Water, Fitting Side A Connection Type FTG, Fitting Side B Connection Type Press-Fit, Fitting Side A Copper Tube Size 4 in, Fitting Side B Copper Tube Size 2 1/2 in, Fitting Material Copper, O-Ring Material EPDM, Specific Fitting Shape Straight Reducing Adapter, Overall Length 6 5/32 in, Maximum Operating Pressure 200 psi, Maximum Operating Temperature 250 Degrees F, Standards ASTM B75, ASTM B88