Transparent polypropylene (PP) storage box designed to keep threads and bobbins organized, protected, and easy to access. Key benefits Durable PP construction: sturdy, lightweight, and easy to clean for longlasting use. Ample organized capacity: 42piece rack system holds a variety of spool and bobbin sizes, keeping them separated to prevent tangling or twining. Quick access and visibility: clear window lets you identify the exact bobbin or spool without opening the box. Dust protection and secure closure: tight lock design provides strong sealing ability to keep contents clean and contained. Practical and convenient: designed for organizing and classifying threads to maintain a neat workspace. What it solves Eliminates tangled threads by keeping each spool/bobbin in its own rack. Reduces time spent searching for colors or sizes thanks to the clear viewing window. Protects supplies from dust and accidental spills with a secure lock and sealed box. Compatibility and performance Material: transparent PP (polypropylene) for durability and clear visibility. Capacity: 42 individual racks suitable for different sizes of spools and bobbins. Function: organizes, classifies, protects, and displays thread supplies while preventing twining. Use scenarios Home sewing and mending: keep bobbins and small spools ready and visible for daily projects. Embroidery and quilting: organize thread colors and sizes to speed up workflow during multicolor designs. Craft classes and workshops: portable, protected storage for shared supplies and quick setup. Care note Wipe clean with a damp cloth; ensure lock is closed for dust protection.