Product Name : Step Up Adapter RingMaterial : MetalMale Thread : 39mm/1.53 inchFemale Thread : 52mm/2.04 inchSize(Approx) : 54 x 6.8mm/2.1 inch x 0.26 inch(Max.D*H)Color : BlackWeight : 6gAdapter ring is suitable for filters, close-up lenses and other attachments to lenses with different filter thread sizes. The 39-52mm Step-Up Adapter Ring easily screws onto the front of any 39mm Lens, and allows you to convert to the 52mm threads of accessory items (such as filters, hoods, flashes and lens converters).Package Content : 2 x Step Up Adapter RingOnly the above package content, other products are not included.Note: Light reflection 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.