Best Seller | USP Commercial Wide Gap Contact 2 In. Gap NC (400-SP-White) The USP Commercial Wide Gap Contact (2 NC) is a commercial-grade magnetic contact that installs on a door window or other opening. Made with rhodium metal contacts and rare earth magnets these contacts are built for reliability. 2-inch gap. CC OC SPDT. more | | $16.74 FREE shipping go to store |