The NORVEL .25 ENGINE CASE, PISTON, CYLINDER SLEEVE, BACK CAP, & CARBURATOR ASSEMBLY is a new set of parts designed for 2-stroke engines, specifically for airplanes and helicopters. Made by NORVELL, these parts are compatible with nitro and glow fuel engines and are suitable for advanced model builders aged 12 and up. This product is a genuine part from the Russian Federation, ensuring quality and reliability for your remote control vehicles.