Proposal of business partnership

I have to write an official e-mail to several companies with proposition of cooperation so I found on the Internet sample letter and changed it a little bit.

Dear Sir or Madam,

We would like to take this opportunity to introduce our company. We are XYZ, a Polish manufacturer of flat gaskets and stainless steel clamps. We provide gaskets for cast iron radiators, water meters, pressure meters, flanges, wide range gaskets for motorization and others. We can adjust our material and dimensions of our products to suit your needs.
Your company is well known for its production of cast iron radiators. We believe that we can establish beneficial business relationship in the field of gaskets supply, as we do with many others manufacturers, also located in Great Britain.
If you wish, you may peruse our website http://www.xyz.com, to find out more information about our company. Should you be interested in this cooperation, would you like to get free samples of our products or have any other questions in this regard, please feel free to send me an email at Email Removed.
Thank you for your time, and we hope to receive your favorably response soon.

Best regards,
Rafal Czachor

I will be very thankful if you could help me correct mistakes.

Best wishes,
Rafal Czachor