Yes, all 630mm ProLuft fans are stock. It same the bad batch with vibration.
The last time you have fan failures in Philippines and we are send 6 fans of 630mm to replace of before, as per your requested.
Which now, we can't claim the warranty fans to Dunli.
Please compile information about the problems or send some video clip shown the problem occurs sent to us in order to the claim those fans.
And this will be effect to the new order SG 0229-0516, due to in our stock still keep the old batch.
So we need to claim the fan in urgent to support this order.