Round sound attenuators. Manufactured from heavy gauge Galvanized steel sheet ACC0U5tic insulation made of fibreglass, tissue protected by aluminium perforated plate. Attenuators above 6500 have guiding fins and attenuating centre pod to decrea5e turbulence and increase attenuation. Attenuat0F5 have flat ended flanges with threaded inserts to facilitate installations. Available in 300mm X 300mm to 1200mm X 1200mm