These dual purpose slide storage/mailing boxes are made of a styrenic thermoplastic material for flatness and durability.
They are easy to open and close.
The lid has a frosted area for marking and the floor of the box has a molded centerline numerical ID with the rest of the floor lined with cork for slide protection.
Since these lightweight slide boxes weigh only 55 grams (less than 2 ounces), they are ideal for mailing slides for lower mailing costs.