The side brush allows your vacuum cleaner to penetrate deep into the carpet for a more thorough cleaning The filter filters fine dust to reduce the penetration of dust, dirtpollen and other allergens in the air you breatheIt can be easily disassembled and replaced as part of normal maintenanceIt is best to replace spare parts every 2 to 3 months to keep the machine performing at peak performanceof its performance above the package content, other products are not included.The measurement allowed error is +/- 1-3cm.The parts are easy to install, make your vacuum cleaner and longer.The vacuum accessories are easy to remove dirt, dust and trash in corners and edges effectively. Especially your hair and your pets hair.It is made of strength and environmental friendly materials.