1) Strict quality control with IQC 2) Graphic overlay 3) Custom made 4) PVC/PET/PC 5) Poly dome and slilk printing 1) Material: Matte PC (smooth), gloss PC + matte oil, gloss PC, PET, and PVC 2) Embossed keys: No embossed keys and domes, domes without embossed keys etc. 3) Adhesive: 3M9448, 3M9080, 3M467, 3M468, 4)Specialize in manufactuing membrane keyboard switch: Overlay+circuit+LED+metal dome ...