3-Layer Filtration & 98.95% Smoke Removal Rate: with pre-filter, extended HEPA filter and premium activated carbon, Creality smoke purifier will perform efficiently with up to 99.97% air purification rate (Note: 4pcs pre-filter replacement are included) Small Size & Strong Suction: The Creality fume extractor is capable of achieving a significant suction power of up to 200m /h, effectively absorbing all exhaust gases, powders, wood chips, iron chips, etc. The purifier's weight is 15.4 pounds that is easy to move. Whisper Quiet Air Purifier: With no more than 55dB noise rate, it ensures a quiet working environment Wide Compatibility: Suitable for Creality Faclon 2 Pro Laser Engraver. It can also be used for most enclosed laser engraving machines and 3D Printer on the market *Note: Creality smoke purifier does not include the exhaust duct. It should comes together with enclosed laser engraver or laser enclosure accessory.The diamteter of the exhaust duct should be 3-3.5inch(7.5-9cm).