Fantasea FRX100 VA R Housing for Sony RX100 III / IV / V / VA (*)The FRX100 VA R Housing was specially designed for the Sony Cyber shot RX100 III, RX100 IV, RX100 V and RX100 VA digital cameras. The FRX100 VA R Housing features an M16 port specially designed for the Fantasea M16A Vacuum Valve (the valve is not included with the housing). If the M16A Vacuum Valve is added to the housing, it enables using the housings pre dive vacuum check. The addition of the M16A Vacuum Valve allows confirming the watertight seal