... 4) Can meet our clients' different requirement to make U-type tube Alloy No.:C70600,C44300,C71500,C68700Standard: GB, ASTM, EN ... standards4.Can meet our clients' different requirement to make U-type tube5.Free from defects such as blowholes, cracks, pin hole ... leaks, etc.Application: Heat exchanger; Condenser; Air Cooler; Evaporator,etc. Top grade U-type Brass Tube