49mm(Male) to 55mm(Male) or 55mm(Male) to 49mm(Male) Macro Reverse Ring Adapter Introduction This reversing ring allows you to mount a 55mm or 49mm(Female) front threaded lens in reverse on a lens mount camera. Reversing the lens greatly increases the macro reproduction capabilities. Brand new, never used Made of metal (not plastic) color : black Package Included:   Macro Reverse Ring Adapter x1 Suitable For 49mm(Female) front threaded lens ( CAMERA 55mm to Lens 49mm) 55mm(Female) front threaded lens ( CAMERA 49mm to Lens 55mm)