Grover Mini Bass 2 On A Side Black Chrome. The Grover MINI is lightweight, compact and durable for modern electric basses. Gear ratio is 20:1. Housing is specially machined to achieve the precise tolerance that prevents slippage and allows fine tuning. Sealed gear box has permanent lubrication that makes the MINI friction-free for life. Individually hand-tested. Screw and bushings included. (144BC)