The HeathrowCardboard Slide Trays 20- and 30-Place hold standard slides (75 x 25 mm and 3 x 1"). The horizontal compartments are recessed to protect the specimens when the cover is closed. They feature thumb cuts for easy slide removal.
20-place slide trays measure 208 x 341 x 9 (L x W x H, mm)
30-place slide trays measure 281 x 328 x 10 (L x W x H, mm)