Steel sprocket zinc plated, 1.chain sprocket,standard sprocket 2.idler sprocket 3. ... sprocket 4,OEM offered We supply:Steel non-standard sprocket zinc plated ,The drawing as followed,We can produce the products ... ~ 48B-4 Technology,•Surface Treatment•Heat Treatment,•Black Oxide Finished,•Zinc Plated,Phosphating,Our factory, CompanyTianjin Haorongshengye Electric Equipment Co.,Ltd ...