Both the clear acrylic and the ABS plastic versions hold 0.1 to 25mL pipets or cans. Racks feature four angled compartments. The ABS plastic version comes with optional attachments to hold pipet bulbs and pipet fillers on both sides ofthe rack. Cut-out "windows" on the ABS version makes the viewing of enclosed pipets easy. Measures 3.5 x 11.5 x 16".