2 x Step Up Adapter Ring:1*a + 1*b Product Name : Step Up Adapter Ring;Material : Metal Male Thread : 72mm/2.8 inch/77mm/3.03 inch;Female Thread : 82mm/3.2 inch Size(Approx) : 83x 7mm/3.2 inchx 0.28 inch(Max.D*H);Color : Black The Bower72-82mm Step-Up Adapter Ring easily screws onto the front of any 72mm Lens, and allows you to convert to the 82mm threads of accessory items (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 77-82mm Step-Up Adapter Ring easily screws onto the front of any 77mm Lens, and allows you to convert to the 82mm threads of accessory items (such as filters, hoods, flashes and lens converters). Weight : 20g Package Content : 2 x 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.