The Omni Swivel Gas Switch Block allows a diver to change between two separate air tanks without having to remove their full face mask. The knob turns a full 180 degrees ensuring that there is no accidental switching during the dive. The knob pointing to the first position signifies that the air source closest to the outlet is in use.
IST Deluxe wheel bag
This bag fits all my gear I know have had it for 2years and it hasn't let me down yet... just an inc ...