Made in Japan, reliable quality Soundproofing Fast Lab ・Japanese-made soundproofing sheet "saegiri" x 24 sheets [Unused x 9 / Used x 14]: Black Black, 1.2mm thick, dimensions 300 x 300 ・Square sound absorption panel "hisoka" x 23 sheets [Used x 23]: White White, 9mm thick, dimensions 300 x 300 I used these once, but I no longer need them, so I'm selling them. There is no noticeable damage, but some of the edges of the sound absorption panels (white ones) have soot on them. They were attached to the ceiling with insect pins at the four corners, so please purchase only if you understand that they are used items. I believe they can be used without any problems in terms of soundproofing and noise reduction. Instant purchase available.