For HEPA 13 + Activated Carbon Combo Air Filter Ultra 2pcs HEPA 13 & Activated Carbon Filtration:Equipped with a dual HEPA13 and activated carbon filtration system, ensuring 99.95% removal of nanoparticles, formaldehyde, VOCs, and odors. Compatibility with for X1/P1 Series:Designed specifically for X1C, X1, and P1S 3D printers, ensuring a and optimal performance. Extended Usage Life:For filaments with low VOC and particulate emissions, the can last up to 4 months; for high VOC filaments, it can last 2 months. High-Quality Material:Constructed with acid-free activated carbon, the filter ensures safe and effective air purification. Easy Installation:Designed for quick and hassle-free installation, allowing for seamless integration into your 3D printing workflow. Specification:2pcs Color: As Shown Material: HEPA13+ Activated Carbon Package Contents: 2 x Air Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.