Uses: Soundproofing felt Material: Rubber Size: 30cm x 30cm x 1.2mm Quantity: 12 sheets Included: Soundproofing sheets (12 sheets) only Color: Gray Excellent soundproofing effect: According to sound insulation tests (see video), the sound transmission loss at a frequency of 1000Hz is 19dB, demonstrating very high sound insulation performance. By using it in conjunction with our polyester fiberboard (density 200kg/m3), the sound transmission loss can be further increased. Easy to install: Weighing only 190 grams, it is very lightweight. Furthermore, you can freely cut it using cutting tools such as scissors or a cutter as needed to create a more beautiful design, preventing the shape from becoming monotonous. The material uses soft PVC resin, which does not contain formaldehyde and can be safely installed on flat surfaces such as room walls, doors, ceilings, and floors. Although it is new and unused, please understand that it is a personal storage item. #Marumaru Shop We have various items for sale, so please take a look. This set of 12 sheets of 1.2mm thick soundproofing sheets aims to solve external noise problems and reduce sound leakage from the room. The surface density is approximately 2.17kg/㎡. These are soundproofing and vibration-damping products for noise reduction. Size: 30cm (length) x 30cm (width) 60-13