2pcs Step Up Adapter Ring:1pcs 52mm-49mm & 1pcs 46mm - 49mm ,Lens Side : 52mm/ 2 inch & 46mm / 1.8 inch, Total Size : 55 x 6.5mm/ 2.2 inch x 0.26 inch (D*T) & 51 x 7mm / 2.0 inch x 0.28 inch (D*T) ,Weight : 7g & 5g The 52mm-49mm ring adapter easily screws onto the front of any 52mm 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) 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). Product Name : Step Down Adapter Ring Filter Side : 49mm/ 1.9 inch Lens Side : 52mm/ 2 inch & 46mm / 1.8 inch Total Size : 55 * 6.5mm/ 2.2 inch * 0.26 inch (D*T) & 51 * 7mm / 2.0 inch * 0.28 inch (D*T) Weight : 7g & 5g Color : Black Material : Metal Package Content : 2 * 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.