Check the listing for details. NIBCO 600RS 21/2 Coupling,Wrot Copper,2-1/2" 39R615. Condition: New. Listed at 30.78 USD. Coupling with Stop, Application Air, Gases, Potable Water, Fitting Side A Connection Type Cup, Fitting Side B Connection Type Cup, Fitting Side A Copper Tube Size 2 1/2 in, Fitting Side B Copper Tube Size 2 1/2 in, Fitting Material Wrot Copper, Fitting Side A Tube Outer Diameter 2 5/8 in, Fitting Side B Tube Outer Diameter 2 5/8 in, Maximum Operating Pressure 269 psi @ 200 Degrees F, Maximum Operating Temperature 400 Degrees F, Specific Fitting Shape Straight Coupling Featuring 99.9% pure copper material, this NIBCO coupling is seamless tubing construction and can form a permanent, leaktight connection that resists corrosion and scaling. This wrot copper fitting is ideal for drinking water, air conditioning, and refrigeration applications in residential and commercial systems.