The Helios ELFBR 315 G4 consists of replacement filter mats made from synthetic fiber, intended for use in LFBR in-line air filter boxes. These filters are rated ISO Coarse 70% (G4) and can tolerate temperatures up to 100°C. They meet fire safety standard DIN 53438 F1, are self-extinguishing, and can be regenerated 10 to 15 times. The filters have a dust holding capacity of 122 g/m² and are supplied in packs of five for easy maintenance and replacement.