Piezo pickups for acoustic guitars, featuring three pickups. - Type: Piezo pickup - Connector: 1/4 inch jack - Included: Mounting parts, cable - Application: For acoustic guitars - Quantity: 3 sensors The diameter of the endpin mounting hole is 12mm. Guitars without a pickup require drilling. Cable length: 50cm Overall length: Approximately 60cm Pickup size: 3cm in diameter The pickups come with double-sided tape. Easy to install on the back of the guitar body.