Copper Tube,wall thickness 0.5mm;OD 4.5mm;ID 3.5mm;
 
Specification:

Material: copper
Wall Thickness: 0.5mm (0.02inch)
Outer Diameter (OD): 4.5mm (0.178inch)
inner Diameter (ID) : 3.5mm (0.138inch)
Length: 300mm (11.812inch) 
(Please contact customer service for other sizes)