This is a Cropped 645 mask set pair. Devere mask fits 504 507 5108 enlarger 2 pieces no guides OEM masks UK Excellent cnd. These masks are designed to work with different Devere enlargers negative carriers. I will be listing many other sizes in other ebay listings. Outside dims 146mmX120mm 2mm thick.  Opening is for a cropped 645 negatives  The inside diameter is 38mmx54mm.

These two masks allow one to print a cropped 645 negative size.  Free USPS ground advantage shipping!

I hav e had to return money on a couple of these maks as the Outside diameter does not make for a perfect fit tin the factory original carrier. Therrfore the se are NO RETURNS PARTS.