¡D¥Î©ó¦s©ñ25¤ù¼Ð·Ç³W®æ¸ü¬Á¤ù ¡D¤ÀÂ÷¦¡»\¤l These compact, durable slide boxes provide the maximum protection for 25 x 75mm (1" x 3") microscope slides. Heavy walls will not warp, splinter, or crack. Boxes are unaffected by humidity and are thoroughly insect proof.