attachment (n)

I have included the presentation as an attachment to this email for your review.
The attachment is a high-resolution image of the product for your reference.
I couldn't open the attachment you sent, so please resend it in a different format.
I apologize for the delay in sending the attachment; there was an issue with the file size, but I've now compressed it for easier transmission.
The attachment is a PDF file, and you'll need Adobe Acrobat Reader to open and view it.