SEA&SEA now has four extension rings available, with the recently added Extension Ring 30L. All new extension rings are equipped with the new port lock system. “L” – signifies locking ring system.
　
The original SX Extension Ring will be replaced with the NEW Extension Ring 20L.

Extension Ring 30L is scheduled for delivery.

The original Extension Ring 40 will soon be replaced by Extension Ring 40L.

ML-NX Conversion Ring 30
ML-NX Conversion Ring, when used, allows for the use of NX ports and extension rings on ML housings.