For bigger tubes like 300B, 2A3, 45 etc we recommend Fedex shipping rather than regular airmail.
Fedex shipping cost of ONE pair :
US, Canada $36
South east Asia $23
Hong Kong, Macau,Singapore, Taiwan $18
Fedex shipping cost of the second pair
US, Canada $11
South east Asia $6
Hong Kong, Macau,Singapore, Taiwan $6
We can ship by EMS. We will calculate update this page in the future.