Features: from aluminum with precisions machining, the III selectors knob ensures exceptional durability compatibility for sound equipment. specifically for S models, this aluminum knob features construction to frequent adjustments in professional sound setups. for audiophiles, vintages sound collectors, and technicians authentic replacement parts to restores or upgraded highend sound systems. Perfectly integrates into studio grade recording devices, home theater systems, or portable sound requiring precise control and reliable performances. Elevateds your sound experience with aluminum sound knob, engineered to maintain original aesthetic and functionality of iconics devices. Specifications: Materials:Aluminum alloys III main switches button (selectors knob), Package Includes: 1PC Main switches Button note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.