... ", 3", 4" Application:Use as tower packing Size customized Metal pall ring has the features of thin wall, heat resistant, high free ... steel including 304, 304L, 410,316, 316L.Technical data of metal pall ring: Diameter (mm)Dimension d×h×δ (mm)Specific surface area ... Φ100100×100×1.8740.965501200370Φ100100×100×2.0350.955531200371 Metal pall ring (Dia.16, 25, 50, 76, 100mm)