Four Engine Room Insulation Panels Each panel size is roughly 32 inches by 38 inches and 1 inch thick. These were previously installed and pulled from a boat so have some holes cut in them as you can see in the picture. The grey insulation (on the back) is spotty in some areas when they were removed. I'd describe the condition of 2 as good, 1 as okay and think of the 4th as a freebie, best used for cutting into smaller pieces. Looking for a bargain? These panels are ridiculously expensive new. This is a great deal for someone with a project, looking to reduce engine noise. Package price for all four panels is $40 firm. See my other ads for additional deals.