This special duration engine from COX is perfect for your R/C airplane needs. Specifically designed for Texaco .049 models, it's compatible with nitro and glow fuel and features a 2-stroke engine. Made in the United States, it's a high quality product suited for serious modelers. With a displacement of .049, this engine is suitable for 1:15, 1:14, and 1:12 scale models. The engine is suitable for those 12 years old and up, and comes with a box, Manual @ x cox wrenches stickers & extra long tread  shaft