The electro penis leather sheath laces up and ties together for a nice, firm and comfortable fit. There are 7 steel electrodes built into the leather sheath, so when you plug it into your favorite e-stim box you can offer quality e-stim throughout the entire shaft. The sheath is a bi-polar item which means it can work independently of any other e-stim accessory. The leather sheath measures 4 inches wide and 4 inches long. You will receive a free universal adapter with purchase. You can use this device with any of our electrosex boxes.