CablesOnline 10-PACK 3.5mm (1/8in) Mono Female Jack to 6.35mm (1/4in) Male Plug Audio Adapter (AV-A31-10) 6.35mm Mono Male (Plug) to 3.5mm Mono Female (Jack) Adapter 10 Pack of 6.35mm Mono Male to 3.5mm Mono Female Adapters Black Molded Plastic Construction Nickel Plated Contacts