NGO Chemical (Tianjin) Trade Co ., Ltd & NGO Chemical Group Ltd. is the main manufacturer of calcium carbide,It established in 2006, Our factory is located in TianJin,China.Production capacity is 3000 tons per month, supplying calcium carbide in size of 80-120mm, 50-80mm,25-50mm,15-25mm,7-15mm,4-7mm,2-4mm,1-3mm.0.5-1mm. all of products are packed with 50kg/100kg/120kg new iron drums. With long-term great effort, naturally now NGO specializes in swimming pool water treatment chemicals ...