Product Name: Analog Amperemeter Meter Face Size(): 6.3 x 5.5 x 1cm / 2.5 inch x 2.2 inch x 0.39 inch (L x W x T) Measuring Ampere Range: DC 1-30A Thread Size: 0.37 x 0.83cm / 0.15 inch x 0.33 inch(D x L); Overall Depth: 5.77cm / 2.27 inch, Manufacturer: Akfldms