Fibreglass Reinforced Plastic made Exhaust Ducts are weather proof and do not rust over a short period of time. These Exhaust Ducts are offered in fibreglass reinforced plastic construction and require less maintenance. These Exhaust Ducts are available with a ribbed or corrugated surface for a higher mechanical strength. Fibreglass Reinforced Plastic made Exhaust Ducts combine features like lightweight design, mechanical strength and impact resistance.