For sale is this Omega 4-Blade Masking Attachment for D series enlargers. This device sits below the negative carrier and allows you to mask off anything you would like, with ease. Great with a glass carrier and smaller sized negatives, or for cropping down any negative size. It will work with any D series negative carrier. Good condition. All the blades move as they should. Not much else you could ask for. Asking $50 plus shipping.