Tread Wear Measuring Gauge For Ng Wheels With Following Measuring Range - 1. Flange Wear Range (13 Mm Below Fro M Top Of Flange) A) Tread Side: - 15 To 30 Mm B) Axle Side: - 0 To 5 Mm 2. Tread Height: - 25 To 35 Mm 3. Flatness:- 0 To 50 Mm [ W Arranty Period: 30 Months After The Date Of Delivery ] ]