New! Made in Japan, High Quality, Genuine Gotoh Tremolo Arm, Push-in Type Specifications ◆ Model Name: AW-1 ◆ Color: C / Chrome ◆ Diameter: Φ5.5mm ◆ Type: Push-in Tremolo Arm ◆ Metric Size GOTOH, renowned as a high-quality, premium Japanese-made parts manufacturer! This "AW-1" is compatible with metric-sized tremolo units such as the Gotoh Wilkinson. If you choose based on quality, GOTOH is the way to go.