This is the OTS SW-1 Aga Hose Swivel For Interspiro Divator MKII Mask Features: AGA Hose Swivel. (Also adapts AGA for use with standard SCUBA hose) The SW-1 Swivel is one of the most popular add-on&';s for your Interspiro Divator MKII (AGA) mask. It not only gives you a 3 way 360Adeg rotation, but it also converts the AGA&';s 16 x 1mm metric threads to a standard scuba 9/16"-18 fitting. This will save you $55 for a special AGA hose! Accepts in-line quick disconnect (QD-YF-S) **Because these items are not manufactured by OTS they are subject to change at anytime without notice and the attached photo may or may not be an exact representation of what is included**