Altman Donut 4 1/8in. x 4 1/8in.

A metal plate used to increase the clarity of patterns in an ellipsoidal spotlight by reducing halation and sharpening the image. With 1 1/4" Hole.

Fits Altman 3.5Q.
Datasheet_1047_Datasheet.pdf
Service_and_Parts_Manual_Drawing_1088_Service_and_Parts_Manual_Drawing.pdf