This is the genuine Cleveland OEM part (number 100330), a handhole gasket for their steam generators or boilers. Handholes are access points on the boiler for cleaning and inspection, and this gasket is the seal that goes under the cover plate. Using the official Cleveland part is crucial here – it's designed to withstand high heat and pressure safely, ensuring a leak-proof seal and reliable operation of your commercial steam equipment. Never gamble with aftermarket seals on pressurized vessels. If your Cleveland steamer is leaking from a handhole, this is the exact gasket you need. Check your equipment's manual or existing gasket number to confirm.