2 pcs Metal Filter Step Up Ring Adapter: 1 pcs 40.5-52mm & 1 pcs 55-77mm Adapter ring is suitable for filters, close-up lenses and other attachments to lenses with different filter thread sizes. Metal Step Up Ring is a must have for the serious photographer You may also combine multiple step rings to fit even larger filters Material: Metal + plastic Color: Black 40.5-52mm Step Up Adapter Ring: Male Thread: 40.5mm/1.59 inch Female Thread: 52mm/2 inch Size(Approx): 55 x 6mm/2.16 inch x 0.24 inch (Max.D * H) The Bower 40.5-52mm Step-Up Adapter Ring easily screws onto the front of any 40.5mm Lens, and allows you to convert to the 52mm threads of accessory items (such as filters, hoods, flashes and lens converters). 55mm-77mm Step Up Adapter Ring: Size: 55mm-77mm 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. Package Contents: 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.