Dear Sirs, for fireproof sound damping mats we need glass fiber woven roving with following specs: Standard roll width range 1000-1500mm, 200-400 gsm, filter cloth / breathable. The fabric should cover rockwool damping mats nearly not visible. Do not answer to Alibaba but send photos and quotation for 1000 kg (every 3 month) in RMB ex factory directly to us.