The diagram shows nominal sizing of units. All guides are made in the USA out of recycled materials
The 4 foot guide is made entirely of ¼” Styrene based plastic. The guide is 7-5/8″ wide and 48″ long with a 1/2″ wide, 48″ long fence attached to the top surface.
Both the 8 foot and the 12 foot long guides are made of ¼” Styrene based plastic with an extruded aluminum fence attached to the top surface.