The accessories should be replaced every 2 to 3 months. All the parts are made of high-strength and environmentally friendly materials. it's easy to remove dirt, dust, and trash in corners and edges from the accessories, especially and pet's hair. Accessories parts are and easy to install size:15cm Material:plastic colour:As Shown Package Contents: 1 x main brush 2 x filters 4 x side brushes 1 x main brush cover 1 x mop Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.