. Made of high-quality material, more durable. Compatible with NT25, NT35, NT45, NT55, NT611 models. As part of routine maintenance, accessories are easy to disassemble and replace. The filter helps keep the robot clean and reduces the penetration of dust, pollen, and other allergens into the air. For best cleaning and filtering performance, replace the filter every 23 months depending on usage frequency. Color: Yellow Material: Plastic Size: 23.6 x 13.8 cm Package Contents: 1 x Vacuum cleaner filter Only the above package content is included; other items are not included. Note: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3 cm.