Specifications ◆ Model Name: GE101TS ◆ Finish (Color): C / Chrome ◆ Type: Tremolo Unit ◆ String Pitch: 11.3mm ◆ Contents: Tremolo body, arm, mounting screws x6, springs x5, spring holder, holder set screws x2, wrench, instruction manual This is the GOTOH GE101TS, a 6-point support type synchronized tremolo unit. It's an item that's also installed on high-end guitars, so you can't go wrong with it. Made in Japan, it's a high-quality, premium part from GOTOH. There's no other company in Japan that can make a product of higher quality. The difference between the GE101TS and the GE101T is that the inertial block (sustain block) is made of steel/iron, resulting in a sound that's more reminiscent of vintage models. Also, as a minor change, the saddle screws are US standard, and there's a subtle difference in the arm insertion hole: GE101T: 5Φ, GE101TS: 4.8Φ. The screw spacing for mounting is 11.2mm, which is the general metric standard. Many models can be swapped out directly. GOTOH's official website has a dimensional chart, so please check there for confirmation. The nut and bridge (tremolo unit) are where the vibrations of the strings first transmit. If you cut corners here, even a body and neck made of good wood won't matter. Please refer to the GOTOH official website for the diameters and sizes of each part.