2PCS Step Up Ring: 1 x 55mm-77mm Step Up Ring & 1 x 72mm-77mm Step Up Adapter Ring Metal Step Up Ring is a must have for the serious photographer Size: 55mm-77mm Color : Black Material : Metal 72mm-77mm Step Up Adapter Ring: Product Name : Step Up Adapter Ring Male Thread : 72mm/2.83inch;Female Thread : 77mm/3.03inch Size(Approx) : 79 x 7mm/3.11inchx 0.28inch(Max.D x H); 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). 55mm-77mm Step Up Ring: It allows using 77mm filters or lens attachments on your digital camera / camcorder with 55mm filter thread. The 55-77 Step Up Adapter Ring is made with light weight and durable aluminum material. You may also combine multiple step rings to fit even larger filters Package Contents: 1 x 55mm-77mm Step Up Ring 1 x 72mm-77mm 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.