Used TIGLON D-REN PRO/4P. Used for about six months, with no noticeable scratches. Diameter: 70mm, Thickness: 3mm Application: Use under audio equipment, guitar amplifiers, speakers, etc. Effect: Suppresses complex resonance that occurs in the equipment's installation environment, aiming to bring out the original performance of the equipment (especially the expansion of the dynamic range and improvement of the sound image). Structure: Utilizes TIGLON's unique magnesium shielding technology. Awards: This accessory received the "Audio Excellence Award Special Award" in 2020. Retail price: 9,900 yen Thank you.