supply of sitc of 50-75mm thick glasswool mineral woolrockwool slab of 100 kg m3 wire chicken mesh over insulation and 24-26 gauge aluminium sheet cladding over the following sizes exhaust pipes from silencer to atmosphere 6 to 8 dia 200 mm nb ms 485mm thick exhaust pipe sitc of 50-75mm thick glasswool mineral woolrockwool slab of 100 kg m3 wire chicken mesh over insulation and 24-26 gauge aluminium sheet cladding over the following sizes exhaust pipes from silencer to atmosphere 6to 8 dia 200 m