Material: Abs+Zinc Alloy+Magnet N52+Tpe. Process: Electroplating+Paint. Size: Diameter 60Mm * Thickness 5Mm; Weight: 33G. Applicable To Apple 12 Or More Series Of Cell Phones, With Magnetic Inductor Can Be Used For 99% Of Cell Phones In The Market. Tpe Inner Ring Is Comfortable To Feel And Rotates 360 Degrees.