... hollow wheelsl 1. material: cast steel, cast iron,45# 2. high loading capacity: 1-30tons 3. wheel gauge: 600,etc Mine car wheel ... : two wheels, one axle, four bearings, and other parts.3. loading capacity: 1-25tons, each one is ok.4. wheel sets gauge ... car, flat bed mine car, small volume mine car, small loading capacity mine car, mining car wheels, wheel pairs, wheel sets, U ...