Features:Made with high quality plastic materials, these filter effectively trap dust, dirt, and allergen, ensuring a healthier home environment.Perfect for busy homeowners who want to maintain their robot vacuums without any hassle or downtime.Whether you have pets, allergies, or just want to keep your floors clean, these filter are an essential accessory for your robot.With easy installation and reliable performances, our hepa filter replacements offer great values and peace of mind.Engine filter provides high filter performances and prevents fine dust from entering and damaging the engine. Foam filter secures additional protections for the engine and should be used alongside the HEPA engine filter. The exhaust air filter with foam catch even very fine dust before the air is released back into theroom. Specifications:Material:PlasticDiameter:Approx.8.6cm/3.38inchFor DerameT10 T20 T30Quantity:2pcs/5pcs Note:.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. .Due to the difference between different monitors, the picture may not reflect the actual color of the item.Thanks for your understandings. Package includes:2pcs/5pcs Hepa Filter