Specifications ◆ Model Name: GE1966T ◆ Finish (Color): GG / Gold ◆ Type: Tremolo Unit ◆ String Pitch: 10.8mm ◆ Sustain Block: 33mm ◆ Contents: Tremolo unit body, complete 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, this high-quality, premium part is from GOTOH, a company renowned for its products! It features GOTOH's unique torque-adjustable arm, stud lock function, and, above all, its unparalleled precision. ★ The sustain block is 33mm. GOTOH's standard specification is a 40mm block. There are no other differences. We are also selling locking nuts that can be used 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 won't matter.