Festool 577975 HF-SYS-AIR H/HEPA Main Filter features an innovative TripleV design that maximizes surface area for superior dust capture and outstanding filtration performance. This unique shape not only reduces rapid clogging but also extends the filter's lifespan, making it i for compact spaces. Designed for easy access and quick , the main filter ensures hassle- maintenance. With a HEPA filtration efficiency of over 99.995%, it provides the highest level of air purification available from Festool, effectively filtering fine dust from the air to create a cleaner working environment. Model Number: 577975