Primacoustic LONDON BT Corner Bass Trap, 24"x 48" - Grey, 2 PackMade from high density glass wool, the London Bass traps are designed to be corner mounted to create an efficient and cost effective low frequency absorber. The perfect add on to London 8 and London 10 room kits, each London Bass trap kit includes two 24 x 48 x 2 (60 x 120 x 5cm) Broadway panels, eight Corner Impalers and all the screws and drywall anchors required for installation in any room. The London Bass Traps are available in black, grey or