The 37-58mm ring adapter easily screws onto the front of any 37mm lens, and converts the thread size of your lens to the thread size of any other 58mm accessory (such as filters, hoods, flashes and lens converters).
The male thread to camera lens: 37mm
The female thread to filter: 58mm
Made of high quality anodized black aluminum (metal).
Filters, lenses, adapters, lens hood, and ect.