brass board water plug thick+net cover
H-148
brass board water plug thick+net cover
Model    ：H-148
Specification ：1+1/2"board plug thick+net Cover
Material ：brass.
Net Weight ：

   brass board water plug thick
　   diameter is 1+1/2".
　   Color is RB.
+net cover
　  material is brass board.
　  Color is CP.

It is a part of H-134_Hidden tub overflow, which is a kind of water leak. The mesh cover can filter things a little and will not block the water pipe under the bathtub.