The main conductor part is a one-piece structure pure copper material.Carefully selected materials such as special nylon glass fiber resin are used for insulation. Description:Brand: FURUTECHItem: 6.3mm Stereo PlugPart Number: FT-763SM-R Shipping:DHL or Japan Post. Payment:Various payment methods are available on ebay. Information – Please note: Please request invoice when you purchase multiple items. We ship out within 3 – 5 days after receiving payment and let you know tracking number. Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility.Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.If you have any question about condition or shipping ,please contact us. Thank you very much for visiting our store!! Marushin Records