Material:N4N6 Cu28-2.5-1.5,NCu40-2-1
              N2200 N2201
Administer standard:ASTM B -161/163
Manufacture technics:rolling,drawing
Size:OD*THK*L/mm
        5-110*1.0-4.5*2000-6000(seamless)
        110*1.0-8*1000-2000  (welded)
         150-2800*1.0-20*500-3000(seamless)