MG Chemicals 5" x 3" Single Sided Copper Clad Circuit Board, 1 oz Copper, 1/16" Thick FR4 Fiber Glass (503)The 500 Series are copper clad laminates consisting of continuous woven glass cloth impregnated with epoxy resin. Compared to a 2 oz. copper clad board, 1oz. boards contain less copper making the etching process much quicker. They are made of FR4, which is a flame retardant version of G 10 material. These boards are ideal for prototyping and small production runs. They require only an anti etching pcb pen and copper etchant. They can easily be used by