Compatible Models: 3508,2112, 21129, 2690, 1520, 23T7, 23T7V, 3130, 31033 | | Fit Many Models Including The 3508 Series, 2112, 1520 Series, 2690, 23T7 Series, 3130 Series And 3120 Series | | Recommended To Replace The Belt Every 3 To 6 Months To Maintain The Cleaning Performance Of The Machine | | Package Include Two Belts;Replace Parts:1604895 160-4895 2037034 | | Easy To Install, Durable, Cushioning Effect, Low Noise, Anti-Skid Wear | |