... : SP320, 430, 640, 740, 1060 One stop EDM Solution SPM EDM ceramic pinch roller SP404Material: Ceramic and stainless steelFitting model: SP320, 430, 640 ... , 740, 1060One stop EDM SolutionWe are ISO9001 ... http://yingsihai.en.alibaba.com to learn more. SPM EDM Ceramic Pinch Roller SP404