<ul> <li>Front side - M32.5x0.5 female thread</li> <li>Rear side - M65x1 male thread</li> <li>Max. diameter - 67 mm</li> <li>Length - 5 mm</li> <li>Weight - 26 g</li> </ul> <p>This adapter allows using Copal #0 shutters (and others with same rear thread) on Chinese focusing helicoids with M65x1 thread.</p> <p>Made of high quality aluminium alloy.</p>