ElectraStim's Halo Electro Clitoral Stimulator is an exclusive, patent pending "Halo' design crafted from a pre-formed tubular laminate of marine grade aluminum and acrylic. They take a piece of 2mm thick clear acrylic tube, bond it in the centre of two solid metal rods with aircraft strength adhesive, add a 2mm pin socket to each pole, then shape and polish the "Halo" Clitoral Stimulator to a fine finish. The result is spectacular! The high quality laminated construction of the probe means the electrodes are built in to the main body of the probe. This means the conductive surfaces will never become detached or wear out! You will need an ElectraStim erotic electro stimulator to use this item. If you are using a different power box and your cable does not have the 2mm pin connector you will need the ElectraStim Adapter Kit. 25mm penetration depth by 40mm diameter; 2mm pin socket compatible.