Akro-Mils 305B1 Insight Ultra-Clear Plastic Hanging and Stacking Storage Bin, 10-7/8-Inch Long by 5-1/2-Inch Wide by 5-1/4-Inch Wide, Case of 12 Transparent, autoclavable polycarbonate material provides maximum visibility and easy identification of supplies Unique "lock-in-place" design allows bins to be securely stacked Strong molded hanger easily hooks onto optional rails or louvered panels for added storage versatility Accepts (1) optional lengthwise divider or (3) optional crosswise dividers, and optional lid