3/4", Brass, Repair Compression Coupling, Has A Brass Body & Brass Nuts, Rubber Gaskets, Rated 125 PSI At Up To 210 Degrees Fahrenheit, Fits Both Iron Pipe & Copper Tube As Listed & Is For Use In Piping Or Repair Of Galvanized Or Copper Pipe, Pipe Must Be Restrained After Installation, Lead Free, No. 160-304Nl: 1" Copper Tube Size, Material: Brass, Maximum Temperature: 210 Degrees Fahrenheit, Pressure Rating: 125 PSI.