1 Size:for 1/8 , 1/4,3/8,1/2,5/8,3/4 inch copper tube outer layer , 2 Wall thickness: ... 8mm to 12mm , 3 Materials:PE foam . Insulated pipe(1) Size ... :for 1/8 , 1/4,3/8,1/2,5/8,3/4 inch copper tube outer layer ... (wal thickness: 8 mm)(2) Wall thickness: ...