Passive 3D glasses polarisation circulair plastic non foldabl

This polarisation glasses is made of black plastic with medium sized spectacle.
The ear brackets are not foldable.
These glasses are used in 3D beamer projections but also with monitors suited with the micropol system like the Zalman monitor and the Acer laptop has.
Not suitable for the normal TV / computer monitor.
The linear component of the left and right filter is horizontally oriented.
These glasses are very helpful with large audiences; easy to be stacked, washable and lasts for several shows.
We have tested these glasses in comon RealD 3D cinemas and they work excelent.
The spectacle does not fit through the mailbox!