Ideal for shipping, storing, or staining slides. These polypropylene containers hold five standard slides (25 x 75 mm and 1 x 3"). Inside wall features slotted channels to keep slides separated and to make removal easier. Lid closes securely to keep slides safe. The side-opening mailer measures 81 x 19 x 31 mm; end-opening mailer is 43 x 24 x 88 mm. Assorted colors: red, yellow, blue, purple, and orange.