5 PAIR (10 AXLES) ROLL-EZ G-SCALE Ball Bearing Black All Metal Train Wheels. 5 PAIRS — 10 AXLES. The highest quality ball bearing wheels on the market. Ball Bearing wheels eliminate all the drag on the curves from rolling on 2 different diameter rails and eliminate skidding and dragging and eliminate wearing out the rails. Your locomotives can pull more cars with less power and also have much longer life on the gearboxes. Your trains will no longer slow down on curves. Sealed bearings cannot rust like other brands. Stainless steel axles knurled at the insulator bushing so they cannot come apart. Fits LGB, USA trains, Aristocraft, Delton, Piko, Hartland, and AMS. Some LGB, Piko, AMS may need axle hole slight enlargement. Solid BRASS and then Silver Plated and double insulated with STAINLESS STEEL axles so they cannot rust. These wheels are the same size as the plastic wheels on most G-Scale trains. 1-1/8 TIRE, 1-3/8 FLANGE. Some slight axle end hole opening may be required on certain LGB or Aristo products as well as possible brake shoe trimming. It is quick and easily accomplished and well worth the effort. Payments are strictly required within 3 days. We will respond to you as soon as possible and do our best to help you out!