Introducing the KNOKOO Pre-Filter Industrial Oil Absorbent Cotton for the FES350 Laser Fume Extractor. Crafted from high-quality materials, this durable pre-filter efficiently captures large particles like dust and debris, enhancing air quality and extending your filter's lifespan. Designed for seamless integration and easy replacement every 10-60 days, it ensures reliable performance in demanding environments. Elevate your fume extraction system today! Welcome to visit our website!