The grey gas-in ball lock disconnect with a ¼" FFL is a manual operation keg disconnect used for serving beer. Made from durable plastic, this device features a grey colour and is designed for easy-use in home brewing setups. The gas-in feature ensures a secure connection for dispensing your favourite bevvy with minimal effort. Perfect for DIY enthusiasts looking to streamline their home bar setup. I've got 5 of these in total to sell. 4 of them have a black screw and one grey screw in the top to access the inside. They all work fine, without issue and use ¼" FFL in to the fitting. If ordered 1 of the 5 will be picked at random and sent out. If that's a problem don't order. Thanks.