Steren 251-165 3.5mm Stereo Jack to 3.5mm Mono Plug Adapter Plug 3.5 mm Female to 3.5 mm Male Headphone Audio Jack Signal MP3 Plug Connector, Part # 251165
3.5mm female mono jack to 2.5mm male mono jack adapter. Don't throw out those old headphones just because they don't fit your new MP3 player. Lifetime Warranty.
Retail Price: $1.95
Our Discounted Price: $0.29