The Benro Master 170mm Filter Holder 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 - filter holder with quick-mounting compression ring, 95mm mounting ring, step-down ring 95-77mm, 170mm light tent, 170mm circular polarizer, 170x170mm 4-stop solid ND filter, 170x190mm 3-stop soft-edge graduated ND filter and carry bag. Fits Canon 11-24mm f/4L USM lens.