Photographers have been trusting our Stayflats® Mailers for years to mail their important photos. Visit our website at calumetcarton.com. Calumet Carton Company is a family owned (4th generation) company, based in the Chicago area that has been in business for over 80 years. We do give volume discounts...the more you order the more you save! We hope you try our Stayflats mailers next time you need to mail your important work!