Draft a short letter of enquiry explaining your needs.
Your letter will need to be written in a formal, impersonal style. You should include this information:

-Introduce your firm and its products to the reader:

We are...

-State the purpose of your letter, telex or phone call:

We are seeking a supplier of...

-Give an exact description or specification of goods you require - size, weight, material, quantity, delivery, special features:

This is the specification of the goods we require...

-Explain what you want the reader to do:

Please quote us your best delivered/CIF price and shipping date. Before placing an order we would need to examine samples of the product.

-State the terms, methods of payment, discounts you expect:

We usually pay by confirmed 60-day irrevocable letter of credit.

-End on an optimistic note and request an early reply:

There is a good prospect of our placing regular orders.
We hope to be able to place further orders with you.
We look forward to receiving an early reply.