Plastic Filter Kit for 120mm fans GRM120 Series Guard & Snap-in Retainer Plastic - reinforced ABS, UL approved materials Rating UL94V-O Media Polyurethane foam material meets UL94HF-1 or higher. Porous mesh 30PPI, 45PPI or 60 PPI available PPI = Pores Per Inch. 30 or 45 PPI recommended for most fan applications Snap-in Retainer makes cleaning or replacing media simple. No tools required. Low air resistance, filtration of particulate matter, noise abatement 4.70 in 119.5mm 4.69 in 119 +/-0.8mm 4.92 in 125mm .40 in - 10.1mm 4.11 in 104.5 +/0.5 mm .20 in - 5.1mm 1.0 in - 2.5mm Part Number Description GRM120-30 120mm Fan filter kit, includes G120P guard, R120P, retainer, and 30 ppi media GRM120-45 120mm Fan filter kit, includes G120P guard, R120P retainer, and 45 ppi media GRM120-30/PK 10-Pack GRM120-30 filter kits, Boxed GRM120-45/PK 10-Pack GRM120-45 filter kits, Boxed 10557 Metric Drive Dallas, Texas 75243 214-340-0265 OrionFans.com RoHS Compliant Information and data is subject to change without prior notification. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Orion Fans: GRM120-30 GRM120-45