. . . "Order) Grade: Carbon Steel, Stainless Steel including 304, 304L, 41or Aluminum alloy Shape: Rings Standard: AISI Dimensions: 16,25,38,50,76,90mm Place of Origin: CN;JIN Application: Metal Tower Packing Tags: Metal Pall Ring | Pall Ring | Packing Pall Ring Verified Supplier - Pingxiang Xingfeng Chemical Packing Co., Ltd." .