I am selling this item because I purchased it but no longer have the opportunity to use it. The packaging has not been opened, and it is in the same condition as when it arrived. Thank you. [Soundproofing Item] [For Upright Pianos] Soundproofing effect: Approximately 16dB Dimensions: 1 piece / 110 x 50 x 3 (cm) Set of 3 1 piece / approx. 1.3kg, total weight of 3-piece set approx. 4.8kg