RuiLing 5PCS 3.5mm Jack to 3.5mm Audio Male Adapter Connectors.(Plastic and Metal Black Black) 3.5mm (1/8") Stereo Male to Male Barrel Adapter. Metal Design for durability Rugged design can handle the most demanding conditions Made of high quality metals for maximum audio clarity, and unrivaled shielding protection and against electromagnetic interference. Overall Size : 2.05" x 0.3"(L*Max.D) This male to male adapter plugs into a female stereo connection on each end. It easily inserts into any headphone or 3.5mm socket and provides a stereo connection.