Altman Donut 6 1/4in. x 6 1/4in.

A metal plate used to increase the clarity of patterns in an ellipsoidal spotlight by reducing halation and sharpening the image. With 2 1/2" Hole.

Fits Altman 4.5Q, Altman S6-20, S6-30, S6-40, S6-50.
Datasheet_1047_Datasheet.pdf
Service_and_Parts_Manual_Drawing_1112_Service_and_Parts_Manual_Drawing.pdf