We offer a large selection of Tuck-Flap mailers. You can search many types of Kraft Stayflats Tuck-Flap Mailers and White Stayflats Tuck-Flap Mailers. Kraft Stayflats Tuck-Flap Mailer is a thick clay-board that resists bending. Attractive, extra-rigid mailers help prevent bending and creasing of photos, proofs, artwork, and diskettes during shipping. The stayflats tuck-flap mailer is a thick clay-board that resists bending. Attractive, extra-rigid mailers help prevent bending and creasing of photos, proofs, artwork, and diskettes during shipping.