1. Model:MB-3001 2. Material: Zinc & Steel 3. Ratio: 1/21 Ratio 4. Option Color: NI CR CS BK BS BN GD ... This item MB-3001 is in high quality and ... contact us if you are interested in them.Option Color: NI (nickel), CR (chrome), CS (chrome satin), BK (black), BS (black ... a sample for inspection if in stock. Bass Machine Heads MB-3001