Soundproofing Specialist Pia Living Soundproof Mats, Soundproof Sheets, Footstep Mats, Made in Japan, Vibration-Proof Mats, Sound Insulation Mats, Soundproofing Materials, Vibration Control, Noise Reduction, Flooring, Impact Absorption, Footsteps, Children, Pets, Piano, Strongest 【Size】747mm x 500mm 1 piece 743mm x 500mm 1 piece 740mm x 500mm 3 pieces 710mm x 500mm 1 piece 706mm x 453mm 1 piece 740mm x 425mm 1 piece *Approximate dimensions 【Thickness】7mm 【Density】220kg/m3 【Quantity】8 pieces 【Material】Polyester, Polyethylene 【Building Standard】F☆☆☆☆ Used for about 2 years. Following the installation method on the official website, they were connected with cloth tape, so adhesive residue remains where the tape was removed. They will be folded for simple shipping. The condition is not necessarily good, with some adhesive marks and fluffing. There are no smokers or pets. Please understand that these are used items before purchasing.