Specifications ◆Model Name: GE1966T ◆Finish (Color): B / Black ◆Type: Tremolo Unit ◆String Pitch: 10.8mm ◆Sustain Block: 36mm ◆Contents: Tremolo unit, all accessories (arm, lift screws, springs x4, spring holder, holder screws x2, screws, 3 types of wrenches), instruction manual GOTOH's Floyd Type Tremolo Unit "GE1996T". Manufactured by GOTOH, renowned for its high-quality, premium parts made in Japan! GOTOH's unique adjustable torque arm, stud lock function, and above all, its unparalleled precision. ★The sustain block is a 36mm specification. (The photo shows a 40mm unit, but the product for sale is 36mm.) For other details, please refer to the dimension chart on GOTOH's official website for confirmation. We also have locking nuts available that can be used in combination with this unit. Please consider purchasing them together. The first point of contact for the vibration of a plucked string is the nut and the bridge (tremolo unit). If you cut corners here, even a body and neck made of excellent wood will be meaningless. Accessories/Parts...Bridge