stainless steel rippling hose(for air-conditioin),quality guarantee Reasonable weight

stainless steel rippling hose(for air-conditioin) :

size:1/2X150    1/2X200     1/2X250      1/2X300      1/2X350      1/2X400

       3/4X150    3/4X200     3/4X250      3/4X300      3/4X350      3/4X400      3/4X450

         1X200       1X250        1X300        1X350          1X400         1X450