〇▼■▲▲●▽□◇□●★◆□●☆▽●☆〇 Hello, thank you for viewing the product. Immediate purchase without comment is welcome! We ship within 24 hours on weekdays. Grooved aluminum bobbin exclusively for industrial and professional sewing machines. + Lightweight aluminum material makes thread tension easier to stabilize + Rust-resistant, so no maintenance is required + The <cut type> with grooves in the shaft can be set on a bobbin winder Bobbins are consumables, so replace them early if you feel any discomfort! If you would like to purchase 20 or more, please let us know in the comments. As this is an overseas product, there may be minor scratches or stains due to the production process or shipping. The color of the actual product may differ from the image due to the settings and output environment of the device and monitor you are viewing, as well as the lighting during photography. We inspect the products before shipping, but if there is a problem with the product, please contact us before evaluation (before the transaction is completed).