Create unique lithophanes with this cast acrylic sheet and your General i-Carver CNC machine. When back lit, your carved acrylic sheets will show the etched design or picture in such a unique and stunning way, that you will have to show people how you did it just for them to believe that it was your own work. A truly unique medium for your CNC router. Perfect for both the 40-913 M1 and 40-915X models of i-Carvers (WC# 852638 and 417362). Dimensions: 12" L x 12" W x .125" H.