Product Model: F4BM PTFE PCB Material: F4BM-300 Layer Count: 2 Layers Dielectric Constant (DK): 3.0 Dielectric Thickness: 0.5mm Finished Thickness: 0.6mm Thermal Conductivity: 0.3~0.5 W/m·K Flammability Rating: UL 94-V0 Copper Thickness: 1oz Surface Treatment: Immersion Gold Application: Microwave Antenna PCB