General description These 4Pcs 40X20mm Aluminum HIFI AMP Speaker Isolation Stands are designed to enhance the performance of your audio equipment. With a new CNC machined finish that includes anodizing and sand blasting, these stands feature a removable non-slip rubber ring, making them suitable for a variety of devices including speakers, amplifiers, instruments, turntables, and CD/DVD players. Technical specifications Diameter: 40mm Height: 20mm Mounting screw hole diameter: 4.5mm Item Type: Banana Gender: Male Color: Silver Material: Aluminum Package Contents: 4 x Speaker Isolation Stand Other information Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement allowed error is +/- 1-3cm.