I didn’t see one single product that each country ships us the most, but here’s some info on what they do export:

Canada: motor vehicles and parts, industrial machinery, aircraft, telecommunications equipment; chemicals, plastics, fertilizers; wood pulp, timber, crude petroleum, natural gas, electricity, aluminum

China: machinery and equipment, plastics, optical and medical equipment, iron and steel

Mexico: manufactured goods, oil and oil products, silver, fruits, vegetables, coffee, cotton

Japan: transport equipment, motor vehicles, semiconductors, electrical machinery, chemicals

Germany: machinery, vehicles, chemicals, metals and manufactures, foodstuffs, textiles

See the CIA factbook for each of these countries for more detail.

Canada- Crude Oil

China- Toys/clothes

Taiwan- Clothes

(This question is really difficult because china is a major supplier for a lot of things)

Basically, those countries that have a large work force that will work for basically nothing.