System notebook rings! This listing is for the rings only; the binder and refills are not included. For those who enjoy handmade crafts or want to replace the rings in their existing system notebooks. Ring diameter: 30mm Rose gold The hardware attached to these rings can be installed with a flathead screwdriver. Get a 10% discount on the total price when you purchase with other stationery items. #LalaStationery Gold, a different color, is also available. Thank you! ( ¨̮ )