Features Wedge Acoustic Foam Pads (L size) Sound absorption & improved room acoustics: The foams effectively reduces residual noise & cancel echoes while improving room sound quality High-density design High quality, fire resistant material Versatile: Ideal for music recording studios, home theatres, vocal/karaoke booths, gaming, computer rooms, control rooms, utility rooms, compressor/machine equipment enclosures, offices, gun ranges, manufacturing facilities and more Easy to install Easy to clean Specifications Shape: Wedge Colour: Black Material: High Density PU Foam Size: Large - Overall size: 30x30x5cm per pc approx - Weight: 50g per pc approx Package contents: Wedge Acoustic Foam Pads x24pcs Clean instructions: Vacuum frequently How to install: 1. Take out the foam from the vacuum compressed package and let it expand to its original shape. This can take 24-48 hours or up to a few days. You may soak it in water for 10 seconds and wring out the water and let it air/blow dry. 2. After expansion, apply self-adhesive or glue on the back of the foams and paste it to desired areas for soundproofing. Can be removed easily and reused for the second time. Please note This item comes in vacuum compressed packaging. Please follow instructions for expansion and installation before attaching the foam for soundproofing. Adhesive/glue not included. Please allow a leeway of a few centimetres in size dimensions due to hand measurement. There may be a colour discrepancy between the actual product and photos due to different lighting, angles and varying monitor or screen settings depending on the device used. Accessories and other items shown for display purposes are not included