Features: 1.Made of high quality copper, sturdy and durable, ensure a long time use. 2.The end pin jack is used for build-in pickup of acoustic guitar, ukulele, banjo, mandolin and other instruments, for assembling and replacement. 3.The outer diameter of the mounting place is about 1.2cm, and the outer diameter of the widest place is 1.6cm. It is suitable for the opening hole with a diameter of 1.3-1.4cm. 4.There is a cushion rubber pad in the installation place to avoid the impact between the jack and the instrument. 5.Mono version, great end pin jack, suitable for musical lovers. specification: Made of high quality copper, sturdy and durable, ensure a long time use. The end pin jack is used for build-in pickup of acoustic guitar, ukulele, banjo, mandolin and other instruments, for assembling and replacement. The outer diameter of the mounting place is about 1.2cm, and the outer diameter of the widest place is 1.6cm. It is suitable for the opening hole with a diameter of 1.3-1.4cm. There is a cushion rubber pad in the installation place to avoid the impact between the jack and the instrument. Mono version, great end pin jack, suitable for musical lovers. s: Condition: 100% Brand New Material: Copper Weight: Approx. 18g / 0.6oz Size: Approx. 6 * 1.6 * 1.6cm / 2.4 * 0.6 * 0.6in Socket Internal Diameter: Approx. 6.35mm Optional Color: Silver, Gun Black Package list: 1 * End Pin Jack