This is an Enya 45 BB RC engine model 6001. This is the first model of the ball bearing Enya 45 engines, it has two piston rings. The engine is in decent condition, it has some discoloration, staining, and a few dings. The engine has great compression, there is one small broken fin, the mounting holes have no distortion. The throttle lever on the carb moves freely. The bearings feel good. From looking at the piston, this engine appears to have been run once, there is a small carbon smudge on the baffle on the top of the piston. Someone used this engine as a donor for screws. The screws that were in the engine had been slotted for a common screwdriver. I did not have any M3.5 phillips head screws, so I put M3.5 socket heads in to mount the front case. With the addition of a prop and a glow plug this should make a fine engine for 45 size RC airplanes. I prefer PayPal, I will accept only PayPal for international sales. International buyers should contact me with their address information before payment so that I may advise shipping charges.