Thank you for viewing. This item has been stored for a long time. Please consider purchasing only if you understand this. - Color: Blue系, Gray系. Some might consider it khaki. The photos were taken under fluorescent lights, and there are reflections. Please understand that the color may differ slightly from the actual product. - Material: Polyester #50 - Spool Color: Blue - Quantity: 41 spools - Usage: Sewing machine thread I have photographed the product numbers where possible, but I do not have detailed knowledge of thread and cannot answer specific questions. Please research if you need more information. If you are someone who can use this for dressmaking or handmade crafts, please consider purchasing.