Yang Quan SLS International trading Co;Ltd. ISO9001:2008 trading company was founded in 2003. We main offer Calcium metal, Calcium Silicon alloy Calcium-Magnesium alloy,Calcium-Aluminum alloy ,CaSiBa ,CaSiMn, Ferro Phosphorus, FeSiMg ....etcWe also offer concrete pump parts including deliverying pipe,elbow,flange and rubber hose.