Tubing

PVC tubing
1/4" x 3/8" vinyl, beverage
1/4" x 7/16" vinyl braided, gas
5/16" x 7/16" vinyl, regular siphon
7/16" x 9/16" vinyl, large siphon
1/2" x 5/8" vinyl, super jet

EVABarrier Double Walled
5mm x 8mm

(inner diameter x outer diameter)