Help raise breast cancer awareness by using Quality Park #10 Regular City of Hope DISS Envelopes. As commercial #10 envelopes, they’re useful for mailing full size sheets, from invoices to notices to promotional materials. No matter what your office needs to send out, the gummed closure will keep the contents secure and safe until the recipient opens it up. With City of Hope detailing, clients will appreciate the business’ support of a worthy cause.