17.5mm Plated Disc shaped Magnetic Clasps with a Roval Miligrain design are sold as 1 finding and have two 6.5mm rings at each end with approximately 4mm inside diameter holes. The overall length of this clasp is approximately 28.5mm. This Magnetic Clasp is available in 22kt Gold Plated, Silver Plated, Antiqued Silver Plated, Rose Gold Plated, and Black Gold Plated.