Material: Plastic+metal Weight: 30 G The ring color is randomly sent. Outer packaging, rectangular or square randomly sent. Feature: Anti-Stress Magnetic Rings,Magic ring It is easy to operate and can play with one hand Relieve stress ,3 to 5 minute average spins greatly fit for fidgety hands,These anti-stress magnetic rings will calm you immediately. Easy to carry, small, simple, discrete and fun, also effective for focus and deep thought with using this magic ring It's a simple and enjoyable gift Specification: Magnetic ring size: Outer ring 3.1 C Inner ring diameter 1.8C Package size: 16X7.6X2.5c/14.5x10cm Package includes: 3x Magnetic ring