item number [SB40]This 40 mm ballstretcher is engineered with two electric sockets for banana plugs. It has ca. 35 mm inner diameter.
This tool needs an electro box with 3.5 mm stereo jack and a connecting cable set. Both are not included in the price.
Here is a worth reading review for the Electro Ballstretcher. Have fun guys and compare! You'll surely see what makes »made in Germany« unique.