Plastic Filter Kit for 40mm fans GRM40 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 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 1.57 in 40 +/-0.2mm 1.46 in 37.08mm 1.45 in 36.9 +/-0.1mm 1.26in 32 +/-0.2mm O3.6 0.126 in - 3.2mm O6 0.24 in - 6+0.1mm 0.12 in - 3.3mm Part Number Description GRM40-30 40mm Fan filter kit, includes G40P guard, R40P, retainer, and 30 ppi media GRM40-45 40mm Fan filter kit, includes G40P guard, R40P retainer, and 45 ppi media GRM40-30/PK 10-Pack GRM40-30 filter kits, Boxed GRM40-45/PK 10-Pack GRM40-45 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: GRM40-45 GRM40-30