The product is a Williams 7000 O Union Pacific 4-6-6-4 Challenger Brass Steam Locomotive. This model is designed for a three-rail system and operates in O gauge. It features a tender and is suitable for hobbyists aged 17 years and older. The locomotive is made of brass, adding a touch of authenticity to its design. Perfect for collectors or train enthusiasts looking to enhance their model railroad collection with a high-quality and detailed steam locomotive. IT IS IN EXCELLENT CONDITION IN THE ORIGINAL BOX. THERE IS NO SMOKE FLUID, IT IS JUST THE LOCOMOTIVE AND TENDER. IT IS SOLD WITH ALL SALES FINAL, NO REFUNDS FOR ANY REASON WITH NO EXCEPTIONS, EMAIL WITH QUESTIONS AND THANKS.