1.The Socket Saver can extend the life of the test sockets on your Amplifier.This adapter is installed via simple hardware into each socket of your amplifier. The Socket Saver then takes all the wear of inserting and extracting tubes from the amplifier. If the Socket Saver becomes worn, simply replace the Socket Saver instead of wearing out your amplifier test sockets. 2.The Socket Saver can increase height When the opening of the panel of the amplifier is too small and the tube or adapter cannot be inserted, use this socket saver to increase the height. The actual product may have slight color difference or difference, which will not affect the use Colour:Black Material:Bakelite Package Contents: 10 x 9 Pin Socket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.