2PCS Step Up Adapter Ring: 1 x 43-52mm Step Up Adapter Ring & 1 x 40.5-52mm Step Up Adapter Ring Product Name : Step Up Adapter Ring Male Thread : 43mm/1.7inch Female Thread : 52mm/2inch Size() : 54 x 6mm/2.1inchx 0.24inch(Max.D x H) Color : Black Material : Metal Adapter ring is suitable for filters, close-up lenses and other attachments to lenses with different filter thread sizes. 40.5-52mm Step Up Adapter Ring: Male Thread : 40.5mm/1.59inch Female Thread : 52mm/2inch Size() : 55 x 6mm/2.16inchx 0.24inch(Max.D x 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). 43-52mm Step Up Adapter Ring: The Bower 43-52mm Step-Up Adapter Ring easily screws onto the front of any 43mm x Lens, and allows you to convert to the 52mm threads of accessory items (such as filters, hoods, flashes and lens converters). Color : Black Package Contents: 1 x 43-52mm Step Up Adapter Ring 1 x 40.5-52mm Step Up Adapter Ring Only the above package content, other products are not included. Note: Light 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.