Customs and duties are charges by the countries government. Shipments by UPS and Fedex will incur customs and duties that may be require to be paid upon delivery or after delivery.
International shipments by USPS may be less likely to have customs and duties (however, this is not guaranteed). We always do our best to ship parcel by USPS internationally. Anything over 50 lbs, may have to ship via UPS or Fedex.