Super satchel box with 2 removable thread trays securely holds thread spools regardless of how the closed box is stored. Spool trays offer the capacity to hold (224) 20-millimeter spools, (108) 32-millimeter spools, or (30) 45-millimeter spools. Designed to easily stack and work together. Molded in translucent acid free polypropylene. Measures-3-1/2 by 14 by 15. (accessories not included).