60 Spools Polyester Embroidery Machine Thread with 3-Layer Clear Plastic Storage Box. Each spool contains 500m of high-quality polyester thread compatible with standard embroidery machines. The stackable and lockable storage box features super transparent design for easy color identification from outside, with 20 plastic pins per layer to secure spools upright and prevent falling. The box accommodates various spool sizes including 500m and 1000m embroidery threads, plus mini spools from different brands. Top lid includes small storage space for needles, scissors, pins and bobbins, making it portable for projects or classes anywhere. Polyester material delivers super color fastness, high strength, exceptional lustre, lower risks of breaking or fraying, with elasticity and tenacity reducing looping and puckering. Package includes free thread nets, 1 yarn snips and 1 color chart.