Had a friend call me and ask me about the fan blade measurement . To clear up my somewhat simple answer - the 2" is the area the fan blade occupys - takes up - space it uses - it's pitch - not the physical width of the blade itself . Now that that's as clear as mud I'm back to work as soon as the new waterpump comes in . ED a clueless newbe new guy FNG ect... Yall have a good day .