Dear Sir, We would like to draw your kind attention to our letter dated in which we enclosed our product catalogue for your reference. As a follow-up to our previous letter, will you be so kind to let us know whether our provided products range is interested you or not? If you have any queries or comments to us regarding our offer? We would be grateful to hear from you with the most valuable information to us. Once again, we wish to express our sincere willingness of cooperation with you for developing mutual benefits and a long-term relationship.Please do not hesitate to contact us for further information you may need. Your kind attention and soon response will be highly appreciated. Sincerely yours,