MTH Premier O Scale Model Trains Railroads Hi-Rail Wheels 20-20953-1 Union Pacific SD70ACe Diesel Locomotive Engine With ProtoSound 3.0. Measures 18 1/2" x 2 5/8" x 4 operates on O42 curves.This could make a great addition to your collection or gift for a friend. Please do not hesitate to ask any questions Thank you Have a great day. The item "MTH Trains 20-20953-1 Union Pacific SD70Ace Diesel Engine ProtoSound 3.0 O Scale" is in sale since Monday, July 23, 2018. This item is in the category "Toys & Hobbies\Model Railroads & Trains\O Scale\Locomotives". The seller is "fredie-one" and is located in Lincoln, Nebraska. This item can be shipped worldwide.