Rimba Electro Play bipolar ball stretcher or cock ring inclusive leadwire with banana plugs. This aluminum ring exists ourt of 2 pieces ( + & - ) half rings, which are insulated from eachother and held together by 2 rubber rings. The inside diameter is 34 mm. The 4 mm banana plug is to be inserted at both sides. When both metal parts touch the human skinn a shock can be applied. Always be careful, do not use if skin is broken or iritated, when you have heart problems or are pregnant. Tip: use rimba contact gel ref # 3000 to experience the best results. This Rimba Elecro Sex ring has a 2,5 mm jack plug that connects directly to all Rimba Power Box devices.