Gasket Tape to Seal the Back of Loudspeaker Cabinets. Useful for Stopping Annoying Vibration from Metal GrillesDimensions: 20 x 4mm Roll Length: 10 Metres. Useful gasket tape for sealing the back of loudspeaker cabinets or any jointing area where escaping air will affect performance. Also useful for stopping annoying vibration from metal grilles etc.. gasket tape-speaker gasket tape