Mytee C317 Carpet cleaning machine and ozone gas generator cooling fan Does not include the chrome wire grill or the wiring to mount it to the equipment (See Related Link Below). 4-1/8" mounting. Used to repair Diamondback, Mytee Products, Ninja, Powrflite, Clean Storm, International Ozone, TMI, and many more **NOTE Mytee has used part number C317 to represent both 4-1/8 mounting as well as 3-1/8" mounting. The 3-1/8 mounting is listed on our website as part number 19471207