1/4" Inner Diameter is the perfect beer/ gas Line. Tubing is odorless, tasteless and can be used for as gas lines, if a tight fit is desired.
Tip: If you heat the tubing in a glass of hot water before connecting it will make the whole connection easier on you.
The 3/16" beer line is the best size use for most home systems. 6 feet will give a great pour in the 8 to 14 psi range. This tubing is ideal for runs under 10 feet. 6 feet is recommended for a foam free pour.