Brand new and high quality. For resonance vibration, stabilizing rotational speed. Lowers noise floor significant. Provides pure signal retrieval. Gives realistic sound reproduction. Improves stereo image and focussing, stabilizes sound image. Gives improved signal when burning quality CDs from LPs. Disc surface stabilizer diameter: 79mm/3.11inch(approx.) Hand-held part diameter: 33mm/1.30inch(approx.) Colour: silver Material: metal Package Contents: 1 * Disc Stabilizer Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.