Specification Amount : 24.99 Binding : Electronics Brand : HAPPYTOPSTAR CurrencyCode : USD Label : HAPPYTOPSTAR Manufacturer : HAPPYTOPSTAR Model : ZJHCM42 PackageDimensions_Weight : 0.03968320716 PackageDimensions : L:2.7199999972256 X W:2.4799999974704 X H:0.349999999643 PartNumber : ZJHCM42 ProductGroup : Photography ProductTypeName : CAMERA_OTHER_ACCESSORIES Publisher : HAPPYTOPSTAR SmallImage_Height : 75 SmallImage_URL : https://m.media-amazon.com/images/I/41B6Q7oDzVL._SL75_.jpg SmallImage_Width : 75 Studio : HAPPYTOPSTAR Title : Metal C Mount to M42 Male to Female C Mount 25mm to 42mm C Mount -M42 Step-Up Coupling Ring Adapter for Lens Filter Telescope Weight : 0 WeightUnit : pounds