The 150mm Benro Master Filter Kit takes the guesswork out of using a filter holder by providing all the essential items you'll need to start shooting great photos right away - holder with compression ring, mounting ring, step-down ring, light tent, circular polarizer, solid ND filter, soft-edge graduated ND filter, filter wrench kit and carry bag. Fits Sigma 12-24mm f/4.5-5.6 EX DG HSM 11 lens.