Features: Application: decoration and structure 1) Standard: ASTM A554 / DIN 17455 2) Outside diameter: 8mm - 101.6mm 3) Wall thickness: 0.3mm - 2.0mm 4) Material: 201, 202, 301, 304, 304L, 316, 316L, 321, 409, 430 5) Surface: mirror polish, satin polish, without polish 6) Packing: each in a plastic bag, then bundle with knitted plastic bag / wooden box 7) The mechanism is good. Tubes can be bended, enlarged, shrunk, and staved Application: heat exchanger, boiler, condenser, pressure vessel 1) Standard: ASTM A249, ASTM A312 / DIN17457 2) Outside diameter: 8mm - 101.6mm 3) Wall thickness: 0.3mm - 3.0mm 4) Material: 301, 304, 304L, 316, 316L, 321, 409, 430 5) Surface: bright anneal 6) Test: eddy current / hydrostatic 7) Packing: each in a plastic bag,then bundle with knitted plastic bag / wooden box Application for car exhausted pipes