EVABARRIER 4mm BEER / GAS (Direct Draw) 12M RollThis high quality beer line will keep your beer in its best possible condition. This 4mm size is the smallest ID that we offer. This small ID is ideally suited to direct draw systems where only a short beer line is needed. This hose is used in the ten litre cooler kit When using this 4mm ID size you will get adequate flow resistance with 5 6 feet of beer line between your keg and tap suitable for most kegerator setups. Pressure Rating (with 1. 5