U bend Tube Standard:ASTM213 Grade:304,304L,306,306L Application:Heat exchangers,suoer heaters,condenser U bend tubeFeatures:1)Standard:ASTM2132)Grade:304,304L,306,306L3)Length:fix length or acoording to your aqirement4)Package:wooden box or steel box5)Product description:heat exchangers,boilers,super heaters Stainless steel U bend tube