You're viewing a set of 4 pistons for I believe an IO-360 Lycoming engine with yes 1.1 hours since new, Hard to believe but it's true it's true! I purchased an engine overhaul shop after the owner suddenly passed and in the invintory were these pistons. Why only 1.1 hours I have no idea but that's what he had written on the boxs and I have no reason not to believe him. I ran my own aircraft repair business next door to him for 25 years and he was always fare and honest. If you desire more photos just let me know and I'll do my best to prvide them, thanks for viewing