ITEM NAME:48mm-42mm Step Down Rings 48mm Lens To 42mm Filter Cap Hood Ring Adapter x2 Description: This stepping adapter allows you to use 42mm filters / accessories on your lens with a 48mm lens filter ring thread. Lightweight aluminum alloy construction,corrosion resistant, black anodized finish for a long using. Suitable for lenses, filters, other adaptor rings, macro extension tubes, screw lens hoods, screw macro lenses/filters, other screw thread lenses etc. Internal Thread: M48×0.75mm External Thread: M42×0.75mm Specification: Material: Aluminum Alloy Size: 52 mm/2.0 inch Package Includes: 2 Pieces Filter Adapter Ring Note: Please allow a slightly errors due to manual measurement. KTT0000324619474340.This stepping adapter allows you to use 42mm filters / accessories on your lens with a 48mm lens filter ring thread. Suitable for lenses, filters, other adaptor rings, macro extension tubes, screw lens hoods, screw macro lenses/filters, other screw thread lenses etc.