Specifications ◆Model Name: GE1966T ◆Finish (Color): B / Black ◆Type: Tremolo Unit ◆String Pitch: 10.8mm ◆Sustain Block: 33mm ◆Contents: Tremolo unit, all accessories (arm, lift screws, springs x4, spring holder, holder screws x2, screws, 3 types of wrenches), instruction manual GOTOH Floyd Type Tremolo Unit "GE1996T". Manufactured by GOTOH, renowned for its high-quality, premium Japanese-made parts! GOTOH's unique adjustable torque arm, stud lock function, and above all, its unparalleled precision. ★This model features a 33mm sustain block. GOTOH's standard specification is a 40mm block. There are no other differences. We also have compatible locking nuts available, so 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 compromise on these parts, even a body and neck made of excellent wood will be meaningless.