OK so originally I bought an 8" Apollo fan 720cfm, for a 4x8 grow room,which a 6 inch would have worked but it had a speed controller so I could adjust it as needed, however not even 4 months later they replaced the fan. NO questions they sent me a new one because the bearings went bad, then not even 2-3 months later the bearings are going again!!! But now its been more then 6months , so now they tell me I have to send the old fan back and they will fix it an send it back which who knos how long that would take.. And I need it running, I'll have a few days in about 2 weeks I'll have a chance to fix it an have it back up before I switch the ones from the tent to the big room... So my question is , does anyone know what bearing they take? Dont wanna rip it Apart an not be able to fix it cause they have to order it , so if anyone has any Info I'd greatly appreciated it