Specifications ◆ Model Name: GE1966T ◆ Finish (Color): GG / Gold ◆ Type: Tremolo Unit ◆ String Pitch: 10.8mm ◆ Sustain Block: 40mm ◆ Contents: Tremolo unit body, all accessories (arm, lift bolt, springs x4, spring holder, holder set screws x2, screws, wrenches x3 types), instruction manual This is the GOTOH Floyd Rose type tremolo unit, "GE1996T". Made in Japan, GOTOH is renowned for its high-quality, premium parts! GOTOH's unique arm with adjustable torque, stud lock function, and above all, its high precision is unmatched. The sustain block is the standard 40mm specification. For other details, please refer to the GOTOH official website for the dimensional chart, which is more reliable. We are also selling locking nuts that can be combined with this unit. Please consider purchasing them together. The nut and bridge (tremolo unit) are where the vibrating strings first transmit their vibrations. If you cut corners here, even a body and neck made of good wood will be meaningless. Accessories/Parts...Bridge