Portable Ceramic Burr Manual Coffee Grinder Core for Home Office Hand Crank Bean Mill Accessories Features: 1. Precise grind with its rust free conical ceramic burr.  2. With adjustable nut, ceramic grinding core, better keep the original coffee taste, grinding does not produce heat. 3.  The thickness of the ground coffee powder can be adjusted by the nut, the finer the clockwise direction, the thicker the counterclockwise direction. 4. Beautiful and elegant design, comfortable e.  5. Easy to clean and portable. Perfect for carrying along for vacations, camping or hiking trips.  Specification: Condition: Material: Ceramic  Color: As Pictures ShownHow it works: Rotary grinding Weight: Approx.17g/0.6oz Package list:  1 * Ceramic Core  Note: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.