OEM Systems ISF-147 Ceiling Speaker Protective Cover Cost effective & simple Pop-up nylon speaker cover protects loudspeakers against insulation fibers & dust particles Keeps voice coil assemblies & speaker components clean Significantly improves installations for longer periods of time 1 size fits all Cost Effective & Simple Pop-Up Nylon Speaker Cover Protects Loudspeakers Against Insulation Fibers & Dust Particles Keeps Voice Coil Assemblies And Speaker Components Clean Significantly Improves Installations For Longer Periods Of Time 1 Size Fits All