These are the cores of bolt fabric. There are nearly 180 in the image. Due to shipping costs, this listing is for 100. It's possible to increase the number of cores by adding to the shipping cost. [Details] Diameter: Approximately 3cm and 3.5cm are mixed. Length: Approximately 78cm Quantity: 100 *There may be some error due to amateur measurement. Can be used for handmade crafts, DIY projects, etc. Roll cores, paper, cardboard, paper pipes, long paper tubes, tubes, cardboard cores, crafts Props, DIY, shelves, wrap cores, toilet paper cores, science projects Handmade, crafts