National Photocolor Corp
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Frequently Asked Questions

Yes, the machined aluminum rings have two threaded mounting holes on the back.

The membrane is stretched over the flat inner edge and firmly adhered to the beveled area.

The frame is made of machined aluminum and is black anodized.

The frames are used to hold pellicle membranes, which are used in laser instruments to protect sensitive optical components from contamination.

The frames are stocked in 1″, 2″, 3″, 4″, 5″ and 6″ circular rings, plus 5″x7″ rectangles.

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