The MM5CBC is the Music Man® StingRay® bass replacement pickup. The dual coil design offers powerful lows, low-mids, and a bright treble. The ''Classic Bass'' series bass pickups are passive designs featuring an extended and more resonant frequency range. They have far more ''air'' and definition at the top without sacrificing lows and low mids. They are cast in epoxy to remove unwanted feedback and microphonics. Please check the physical size of the pickups you want to replace to make sure the replacements fit properly. Dimensions: Length = 3.50''(88.90mm), Width = 1.90''(48.13mm).