... ,25mm,38mm,50mm, 76mm,90mm Material: SS304,SS316,SS316L,SS410 Metal pall ring is made of materials like carbon steel, stainless ... it is widely used in packing towers in petrochemical industry, chemical fertilizer industry and environmental protection, etc. Technical dataSizes(mm)Bulk ... steel, stainless steel including 304, 304L, 410,316, 316L, SS410. Metal Pall Ring