New! Made in Japan, High Quality, Genuine Gotoh Tremolo Unit Specifications ◆ Model Name: GE101TS ◆ Finish (Color): GG / Gold ◆ Type: Tremolo Unit ◆ String Pitch: 11.3mm ◆ Contents: Tremolo body, arm, mounting screws x 6, springs x 5, spring holder, holder set screws x 2, wrench, instruction manual This is the GOTOH six-point support type synchronized tremolo unit, the "GE101TS". This is a reliable item, also used in high-end guitars. Made in Japan, high quality, GOTOH is known for its high-end parts. There is no other company in Japan that can produce products of higher quality. The difference between "GE101TS" and "GE101T" is that the inertial block (sustain block) is steel/iron, resulting in a more vintage-oriented sound. Also, as a minor change, the saddle screws are US standard, and there is a subtle difference in the hole for inserting the arm: "GE101T: 5Φ" and "GE101TS: 4.8Φ". The screw spacing for mounting is 11.2mm, which is a general metric standard. Many models can be replaced directly. Please check the GOTOH official website for the dimensional table to be sure. The nut and bridge (tremolo unit) are where the vibrating strings first transmit their vibrations. If you cut corners here, even a good wood body and neck won't matter. Please refer to the GOTOH official website for the diameters and sizes of each part.