Single belt for use on SP7025, and Electrolux Oxygen Canister models EL6988A, and EL6889A series canister vacuums. For optimum performance, change your belt at least every 12 months. This is a geared belt, which has small teeth on the inside of the belt, help grip the roller brush better. These belts tend to last longer then standard flat belts which stretch and break much more often the geared belts do.