For carburetor vent line applications 1/8" ID vent line can be extremely tight fit for large displacement engine carb size, and 3/16" ID may be better fit for venting larger size carbs. Gas cap vent line is usually 3/16" ID. Measure ID of vent line prior to choosing size.

Features:

• 1/8" (3.2mm) ID X 1/4" (6.4mm) OD
• Premium polyurethane
• 85-Durometer
• Has superior resistance to kinking, abrasion, tearing, oxidation and chemical damage
• Very flexible with tight bend radius
• This line will not get hard over time and stays flexible within a wide range of working temperature (-75 degrees F  to 175 degrees F.)
• Melting temp 370 degrees F.
• When replacing tubing or hose it is always a good idea to use clamps even on gravity feed systems