U.S. Customs and Border Protection (CBP) 

In order to avoid any potential problems in the clearance of your merchandise, the U.S. Customs and Border Protection (CBP) strongly recommends that you familiarize yourself with CBP policies and procedures prior to actually importing/exporting your goods.

You should also be aware of any entry requirements specific to the particular commodity you are importing/exporting, including those of other federal agencies. To assist you, we offer the following link for new importers and exporters.
We also urge you to read the Informed Compliance Publications. CBP has prepared a number of Informed Compliance Publications (ICPs) in the "What Every Member of the Trade Community Should Know About..." series on a variety issues.
Prior to importing, you should contact our Customs Brokerage.
When calling our customs broker, the importer should provide as much detail regarding the transaction as possible. In order for your import specialist to best assist you, it is important you be able to exactly describe the merchandise you are planning to import.

In order for the import specialist to best assist you, you should provide a full and complete description of the article and answer specific questions such as:

1) The country of origin of the merchandise and manufacturer;
2) The composition of the merchandise;
3) The intended use of the item; and
4) Pricing/payment information (in order to properly determine the value of the shipment).

For more information on the classification of merchandise, you should  consult with us .