Get the perfect fit for your length with this individual electraring cock ring. designed to plug into your electrastim stimulator (sold separately), this electro cock ring has a 2mm unipolar input and is designed to be use alongside any other unipolar electrode (also sold separately). you can either buy two rings and wear one around your shaft and the other beneath your glans or choose from a wide selection of electrastim electrodes.however you choose to wear this single cock ring you can expect powerful contractions and intense tingles that can bring some men to climax with no other stimulation required. they also act just like a traditional metal cock ring, restricting the blood flow during wear to enhance the staying power of your erection and help improve the intensity of your climax.this ring measures 32mm (approximately 1.25 inches in diameter).uni-polar designavailable in other sizes2mm inputrequires an electrastim stimulator to operate