copper tubing, acr copper tubing, refrigeration copper tubing, soft copper tubing is mainly used for refrigeration. Our copper tubing is R410a rated. The copper tubing is inserted by rubber plugs to keep copper tubing inside surface clean. The copper tubing is produced according to ASTM B280 standard. The temper of copper tubing can be hard, soft annealed. Half hard temper for copper tubing is also available.