Product review (3 stars): All parts in the package are good, but not the white bottom felt which has ...
All parts in the package are good, but not the white bottom felt which has some places are brownish. (The white bottom felt should be all snow white like sheep wool.) The brown color is either from worn rim of drum or the adhesive or both, if so it had been tried by previous buyer but at the end not used and returned back to the seller and the seller repackaged.  Or already colored from the maker's manufacturing or packaging process.
We should opened the package earlier so we could return for replacement.  But was too busy in past 3-4 weeks so we miss the return period as we didn't expect this can happen.