Modern design: Casing gently curved, surface slightly eroded, side with vertical grooves - Comfortable: With fine grip edge - Stable: Casing made of non-breakable plastic - Bottom of the ferrite magnets are varnished in order to protect the magnetic surface - Versatile: Many colours, shapes and sizes to choose from - Space-saving: In informative box with viewing windows for colour recognition purposes Size: 0.95cm H x 3.2cm W x 3.2cm D