This kit consists of the following filters: An 80A, 80C, 85B, and 85C. They are supplied ready-mounted for use in the Lee Filter Holder. This set also contains the Lee Gel Snap. The Gel Snap is Lee's easy and affordable filter holder. Simply insert your 4 x 4" filter, snap it shut, and "snap" it on to any lens 82mm or smaller using the included "Elastomeric Tension Device", also known as an "E.T.D.", i.e, rubber band.