Copper tubes for general engineering Copper tubes for refrigeration and air conditioning High conductivity copper tubes Cupro nickel tubes DHP & DLP Grade Copper Tubes Properties: In round, square, rectangular or any other shape according to drawings. Sizes range from 6mm to 90mm OD and thickness from 0.6mm upto 20mm. Use: Used in refrigeration and airconditioning, plumbing, hot and cold waterpipes for heaters, terminal lug manufacturing and so on