... OEM from China; Certification:ISO14001 ISO9001 SGS Specifications Colored metal flat washersProcess Capablilities Standard ISO, GB, DIN, JIS, ... copper, aluminum, iron, stainless steel and so on. Through our modern manufacturing technology, ongoing product development program, highly ... develops well with the support of all customers. We have passed ISO9001:2008 and ISO14001:2004 Environmental ...