5.2mm / 12mm / 15mm / 18mm
- Factory 1: With the area of 10,000 square meters located at Dinh Tram Industrial Zone, Hoang Ninh Commune, Viet Yen District, Bac Giang Province, Vietnam.
- Factory 2: With the area of 8,000 square meters loacated at Phu Tho Province, Vietnam.