Schaller M4 90 series (Light) chrome bass tuners for 2+2 headstocks. 2 left and 2 right. Can be a replacement for some Alembic, Kramer, B.C. Rich, Gibson and other basses. 12:1 ratio. Includes peghead bushings and mounting screws. Made in Germany. Measures: 0.432" (11.0mm) Peghead Diameter; 0.550" (14.0mm) Bushing Outer Diameter; 0.407" (10.3mm) from Peghead center to Mount hole center. Brand new $110 shipped.