This Ikelite flat port is for lenses that are from 5.5" to 6.5" (14 to 16.5cm) long. It is for long lenses whose focus collar extends beyond the housings focus gear.
This item is controlled on the U.S. Commerce Control List set forth in the Export Administration Regulations or the U.S. Munitions List set forth in the International Traffic in Arms Regulations, and may require a license or other authorization from the U.S. Government to be exported from the United States. Without limitation, parties purchasing from B&H are solely responsible for determining applicable export licensing requirements and for obtaining any licenses or other authorizations from the appropriate agencies of the U.S. Government that are necessary for exporting the item, such as the U.S. Department of Commerce or the U.S. Department of State