... with competive price 3,Fast delivery time Doule-sided Flexible Circuit consists of double-sided copper clad material with top and bottom cover ... printed through holes(PTH) covering the dielectric layer.Types:Single-sided, Double-sided, Multi-layers (max 6 layers) fpc board andRigid PCB, Aluminium ... UL-94V-0Performance Test:100% electrical and electricity performance test Double-sided Flexible circuits