The channel letters we manufacture are made of aluminum and Slash by a CNC router. The router results in the back in the channel and is The premise for that letter shape. Returns, the sides on the letter, are then formed by bending a 3- to six-inch-large strip of aluminum https://backlitchannelletters32198.suomiblog.com/not-known-factual-statements-about-commercial-lighted-signs-51067517