2 pcs Adapter Ring: 1 pcs 72mm-77mm & 1 pcs 52mm-77mm This is a high quality 52mm-77mm Step Up Filter Ring. The 52-77 Step Up Adapter Ring is made with light weight and durable aluminum material. It allows using 77mm filters or lens attachments on your digital camera / camcorder with 52mm filter thread. You may also combine multiple step rings to fit even larger filters. Product Name:Step Up Adapter Ring Material:Metal Color: Black 72mm-77mm: Adapter ring is suitable for filters, close-up lenses and other attachments to lenses with different filter thread sizes. The Bower 72mm-77mm Step-Up Adapter Ring easily screws onto the front of any 72mm Lens, and allows you to convert to the 77mm threads of accessory items (such as filters, hoods, flashes and lens converters). Male Thread:72mm/2.83 inch;Female Thread:77mm/3.03 inch Size(Approx):79 * 7mm/3.11 inch * 0.28 inch (Max.D*H); 52mm-77mm: Metal Step Up Ring is a must have for the serious photographer Size: 52mm-77mm Package Contents: 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.