DescriptionThese studio acoustic treatment accessories can reduce noise, sound and sound absorption.They are made of sponge, which are flame retardant and durable in use. It has good craftsmanship and creates a more quiet and comfortable environment for you. It is an indispensable tool for recording studios, bars, and KTV.Features- Color: Grey-Material:Sponge- Size: 15.00X15.00X15.00cm,24.00X12.00X12.00cm/5.89X5.89X5.89in,9.43X4.72X4.72in-This bass trap will help eliminate reverb and unwanted sound in any studio.-Softer sponge, high density, the sound absorption effects are good, suitable for studio and KTV etc.-Perfect for home theaters, professional movie theaters, nursery, concert halls, and more.-These sound absorbing sponges are flame-retardant, so it is a safe material to install in your room.-Pyramid and cube sound-absorbing sponge combination set, with beautiful appearance and good acoustic characteristics.Packing list: 12 x corner low frequency cottons4 x cub sound absorbing cottons