Thank you for viewing. This listing is for a set of 10 brand new 6.35mm female mono input/output jacks for electric guitars and basses. These are standard jacks commonly used in effects pedals, stompboxes, and switchers. Size: 6.35mm Stereo type jacks are also available. 150 yen/piece. Please let me know in the comments if you would like to change to stereo. Immediate purchase is welcome. Shipping is free.