Cine-Pro(TM) Brand - Magna-Linear(TM) POLARIZED 3D Glasses Cardboard White Frame - 3D Projector Presentations - FOLDED & SLEEVED - 6 PAIRS White cardboard frames with temples for a low-cost solution of your LINEAR polarized glasses needs. Linear Polarized Glasses are the general purpose glasses used for polarized projection of slide shows, multi-media displays, concerts, movies, simulator rides, and viewing polarized prints and vectographs (StereoJet prints) - Polarized glasses contain light gray filters. . Linear polarized glasses have the left and right axis at 45 degrees and 135 degrees (perpendicular to each other), and a standard transmission of 37%. They feature superior quality 6-ml polarizer film. The white cardboard glasses are also to be used for any type of polarized projection on a screen using vintage stereo projectors like the TDC, Compco Triad, Nord, View-Master Stereo-Matic 500 and others. The glasses are also used with twin 2d projectors that have linear polarizers. Two different fold-scores allow you to fit the glasses to smaller or larger viewer's heads. Each pair is folded in a clear resealable sleeve. These glasses are for use in many IMAX movie theatres and NOT for viewing IMAX films at home. For home viewing, other types of glasses are needed.