Guangdong Threenh Technology Co.,Ltd. was found in 1998, and we have 3 factories, more than 15000 square meters, and many offices in China. We specializes in the R&D, production and sales of colorimeter, gloss meter, spectrophotometer, density meter, color light box/table, coating thickness gauge, iso test chart etc, which is the leading producer in the color and glossy surface measurement field in China. We support OEM&ODM service and passed CE, ISO 9001, ROHS, FCC, TUV certifications.