Description Pack of 10 sheets Size: 4" x 6" Thickness: 1.6mm Material: FR1 copper clad (Double Sided) This 4" x 6" FR1 Copper Clad Double Sided (10pk) is a pack of 10 sheets. This material is ideal for quick prototyping of PCBs. It's made of FR1, instead of the more common FR4, for longer cutter life. View more What's Included 1 x 4x6” FR1 Copper Clad DoubleSided (10pk)