EQ Acoustics Spectrum 2 L10 Bass Trap Nat, Bass Absorber, Material: Absorber core made of 100% polyester with textile cover, Very sturdy, Not irritant or allergenic, Odourless, Good efficiency at low frequencies, Membrane layer technology (foil membrane between core and cover) for better efficiency in the bass range, Wall and ceiling mounting possible with Flexi system (Velcro compatible for wall mounting), Fire protective standard core material: EN13501-1:2007+A1:2009 [B - s2, d2], Fire protective standard fabric covering: BS476 Class 1, Dimensions: 1150 x 575 x 100 mm, Colour: Natural, Suitable fixing material (not included in delivery): Flexi Blocks (Article Nr. #442768#), Flexi Clips (Article Nr. #442769#), Flexi Hooks (Article Nr. #442770#), Corner Bracket Wall (Article Nr. #442771#), Corner Bracket Ceiling (Article Nr. #442772#)