Stone Metal America, LLC. is a Dallas based, metal products supplier, providing the customers with valve products and precision-engineered metal parts. Stone Metal America, LLC. is a subsidiary of Stone Industrial Co., Ltd. We together are a group of engineers and companies in mechanical engineering, all Stones manufacturing facilities are quality certified to ISO 9001. We are more than simply manufacturing products that meet customers basic requirement. We are expert at co-designing and value engineering. Based on the understanding of customers goals for product, our engineer group will translate costumers information into designs, processes and products that perfectly meet costumers spec in a cost effective way.