2x Step Up Adapter Ring: 1* 46mm-49mm + 1* 43-49mm Product Name : Step Up Adapter Ring Lens Side : 46mm / 1.8 inch Filter Side : 49mm / 1.9 inch;Total Size : 51 x 7mm / 2.0 inch x 0.28 inch (D*T) Material : Metal Color : Black Male Thread:43mm/1.7 inch Female Thread:49mm/1.93 inch Size(Approx):51 x 6mm/2x 0.24 inch(Max.D*H) The 46mm-49mm ring adapter easily screws onto the front of any 46mm lens, and converts the thread size of your lens to the thread size of any other 49mm accessory (such as filters, hoods, flashes and lens converters). Adapter ring is suitable for filters, close-up lenses and other attachments to lenses with different filter thread sizes. The Bower 43-49mm Step-Up Adapter Ring easily screws onto the front of any 43mm Lens, and allows you to convert to the 49mm threads of accessory items (such as filters, hoods, flashes and lens converters). Weight:10g Package Content:2x Step Up Adapter Ring Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.