This is a Normal Devere 6X6CM mask set pair. Devere mask fits 504 507 5108 enlarger 2 piecesincluding the very raree & desireable film guides which mke it much easier to load your negative into your mask! This mask  set psair includes built in film 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 145mmX120mm 2mm thick.  Opening is for 35mm film.  The inside diameter is 36x24 mm.

This is the only Devere mask set pair Im selling with the desirable guides. 

Message me ny questions!

Sincerely with Thanks,

Jay Overmoen

Cedar City, UT, 84721