Check the listing for details. C Mount to M42 Screw Thread Lens Mount Adapter Inner 25.4mm with flange. Condition: New. Listed at 7.60 USD. - C mount screw mount lens to M42 screw mount body with this adapter. Or for modify lens purpose. - Female mount (inner): C Mount (diameter 25.4mm) - Male mount (outer): 42mm(diameter) x 1mm - Material: aluminium - With flange - Focusing to infinity not available - C mount screw mount lens to M42 screw mount body with this adapter. Or for modify lens purpose.- Female mount (inner): C Mount (diameter 25.4mm) - Male mount (outer): 42mm(diameter) x 1mm- Material: aluminium- With flange- Focusing to infinity not availablePackage- 1 x mount adapterNOTE:- Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility.- Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying.