The lead-free wrot copper solder pressure 90 deg close rough fitting elbow is used in residential and commercial systems such as potable water, air conditioning and refrigeration. Options include cleaned and bagged for oxygen service (medical gas). The 90 deg elbow features a solder cup, male solder end and a close rough radius. The fitting provides a means of changing the pipeline direction 90 degrees. They are used when velocity is not a problem In addition to its inherent qualities of beauty, durability and low maintenance, copper's reusability makes it an ideal application in sustainable projects. copper fittings are manufactured in an ISO 9001 certified facility and backed by a 50-year limited warranty. Because of its longstanding reputation for innovation and precision in design and manufacturing, is the preferred brand in the industry.