1,material:silical sol 2,size:according to customer's drawing 3,factory type:maufacturer Dear sir/madam , This is Dongying Taifung Precision Metal Co.Ltd,which is located in Dongying city Shandong province,China.We mainly produce precision casting products,such as stainlesss steel products and carbon steel products .It includes kind of hardware accessories and all kinds of special machinery parts ...