Aluminum Joyner ACFT20128 HIKARI

When used on indoor walls, high-pitched sound that is unpleasant to humans(2000 to 5000Hz)can be absorbed by approx. 60 to 80%.Can be cut with a cutter, and used as a pinboard.Can also be used as safety measures in the event of a wall collision.For absorbing sound inside factories, offices, facilities, mansions and houses.Safety measures.For fixing a sound absorption felt board/a 9mm board.Height (mm):20Outer width(inner diameter)(mm):12(9.5)Total Length (mm):1820PolyesterAluminumSurface Treatment: Alumite FinishingBecause of the product nature, color and thickness of the felt board may slightly vary according to lots.If it does not stop completely when using an aluminum joiner, please use adjustment materials, etc.