Organize your threads and supplies with the ArtBin Thread Collection. The Super Satchel™ Thread Box has two removable white thread trays that provide maximum storage capabilities. The Cone Thread Tray's sturdy base with easy to insert prongs holds a minimum of 25 and up to 50 serger thread spools while the extra depth of the Super Satchel™ Double Deep allows for storage of larger bulkier supplies.