The Silvercrest SSR1 Ssra1 Ilife A9S A9 A7 Robot Vacuum Cleaner Main Brush Cover is a durable and practical accessory that ensures optimal cleaning efficiency. Compatible with Silvercrest SSR1 SSRA1, Ilife A9s, A9, and A7 robot vacuums, this brush cover is easy to install and helps enhance the machine's performance by regularly removing dirt, hair, and allergens from your home.