This is a four chambered (4-tone sound) 8 inches long quality wooden train whistle. Produces authentic old steam train whistle sound when blown into. There are imitators, but none can achieve the great sound of our original train whistle, made right here in the USA. Easy to blow - produces authentic old steam train sound - you can almost see the train. This wood train whistle is 1-3/8 inches square and 8 inches long. Has smoothly sanded edges and surfaces and an exclusive, rounded mouthpiece.