WonderPana FreeArc Step-Up Ring 95mm-145mm from Fotodiox Pro, Anodized Black Aluminum, 95mm Lens Thread to 145mm Round Filter 145mm x 1mm Standard thread step up ring for all lenses with a 95mm filter thread; Can be expanded for other lenses using additional step rings Industrial Grade Aluminum with Anodized Flat Matte Black Finishing Allows Filter to fit Standard Lenses Can be upgraded with the 66 Bracket which allows the 66 filters (6.6x8.5" rectangle size) to fit 24 Month Manufacturer Warranty