U bend Tube Standard:ASTM213 Grade:304,304L,316,316L Application:Heat exchangers,suoer heaters,condenser U bend tubeFeatures:1)Standard:ASTM2132)Grade:304,304L,316,316L, 3)Length:fix length or acoording to your aqirement4)Package: wooden case5)Product description:heat exchangers,boilers,super heaters U bending tube