Large optical glass lens assembly from Hitachi 50" rear projection TVs. This assembly contains several lenses and a front surface mirror. These are optical only -no electronics. Lens sizes are about 3.4" diameter (front lens) and 1.6" diameter (rear lens). Overall assembly is about 3.4" x 4.7". These have been removed from television light engines and appear to be in perfect condition. Sold as a package of 2.