Viega 20633 4" CxC XL 90D Elbow. These 4" ProPress 90 Elbows are a simple and easy way to get copper tubing where you need it, rather its a tight space that's hard to get to, or a just a simple install or repair. These 90's feature ProPress ends for quick and efficient connections. Some of the improved features of using ProPress include colored dots on each fitting, a quick and efficient way to see if the fitting has been correctly pressed, a manufacturing warranty, and cleaner more convenient connection that's 75% labor saving. ProPress requires one tool, no flame, and has a worldwide credibility of quality.