This is a set of two brand new, unused one-way clutch bearings / roller clutch bearings. The model is EWC1008, with an inner diameter of 10mm, an outer diameter of 16mm, and a width (height) of 8mm. These can be used in models like the Antares AR, but please confirm the size with your existing parts before ordering. Feel free to ask any questions you may have. Multiple purchases are also possible. (No returns or exchanges accepted.) Shipping is planned via Rakuraku Mercari Bin or Yu Yu Mercari Bin (shipping services in Japan), but this may change, so please understand. Thank you for looking.