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