Our manways come in 4 common sizes - ASME Clear opening 24", 30", 36", and 48". We also have parts on hand such as gasket kits, hand wheels, etc. to help out if the customer just needs to do a quick repair to a manway. Our manways are built out of the most common stainless steel. 304 and 316L is what we work with most. Our manways are 100% stainless.