M65-M65 65mm x 1mm Screw Mount Extend Tube Ring Adapter Lens Hood Aluminum 8mm                                 

Product Feature:

This extender allows to increase distance from a lens to camera than may be necessary to use some projection lenses on focusing helicoids

Female side - M65x1mm screw thread

Male side - M65x1 screw thread

The inside of the adapter is fully threaded to minimize reflections. 

Heigth: - 60mm 

Weight - 100 g

Material for metal,reliable performance.Durable.