goes in place of your asa and you screw you bottle to the maxflow and it is a asa and reg allin one also an on/off built in. If your going abroad you undo two grub screws and your bottle screws off with ease.
lo m8 interested in remaining rotor with missing lid and colour kit , is it in working order with just these parts missing and does it have shark fin , if so will take for asking price please