A set of 12 Multigrade Filters specifically designed to be used under the enlarging lens. The filters are mounted in hard plastic 2½"x 2½" frames, which will fit the under lens filter holders supplied by Omega and Beseler, and other enlargers with similar size filter holders. For enlargers without a filter holder, the kit includes a universal holder which can be attached by clamping it onto the lens, or using the included mounting adapter. The grade number is printed on the handle of each filter. The kit includes 12 Multigrade filters, ranging from grade 00 to grade 5 in ½ grade increments, red safety filter, storage box with cover, universal filter holder, mounting adapter, mounting hardware, and instruction booklet.