Thank you for viewing! *Although we clean the items during packaging, there may be dust or lint inside the spools. ◇ No. 50 ◇ 100% Polyester ◇ Ace Crown ◇ 24 colors, 72-piece set - thin spools and thick spools ◇ 3 spools of each color There are no noticeable stains, and they can be used with lockstitch machines and home sewing machines. ◆ We take great care in handling the items, but there may be scratches or stains. ◆ The colors may appear different from the actual product depending on the device you are viewing on. ◆ Rewound threads are not rewound by us. We appreciate your understanding before purchasing.