From the product description, check product page for current description, price and availability:

Bevflex 5/16 ID X 9/16 OD Beer Line Hose. Red to often used to indicate gas hose, but this line also works great for liquid. We also carry this hose in Blue for identifying liquid applications. American Made, dual durometer (see description below) tasteless and odorless hose for superior liquid or gas delivery. This is commercial quality, American Made hose is also NSF rated and perfect for commercial or home applications. This hose is twice the thickness of some hoses offered by other companies. Sold by the foot.

• Dual Durameter – This refers to the two layers of the hose. The inside layer is clear and is a harder durameter so it will retard permeation of the flavors and odors from the liquid being dispensed. The outside layer is red and much more flexible. The combination of the two give the best compromised of protection coupled with flexibility.
• This hose is NSF rated. NSF is an international organization dedicated to verifying the safety of food safe products
• Phthalate Free
• Bevflex 204 hose is widely used in the draft beer industry. It is manufactured in the United States

• The Most Difficult Spot to Check for CO2 Leaks
• Keg O-Ring Materials Selection! – EPDM, Silicone and Buna-N?
• Why Do I Have Bubbles in My Beer Line? Diagnosing and Fixing Kegerator Foam Problems
• Five Benefits of Using Corny Kegs As Fermenters
• Rebuilding & Reconditioning Homebrew Kegs!
• Food Safe Replacement Keg O-Rings in Bulk
• Hands on Review: Kegland DuoTight Fittings & EVABarrier Tubing!
• Why Won’t My Homebrew Keg Carbonate? Fixing Draft Beer Carbonation Problems
• What Does a Flow Control Faucet Do?
• Upgrade Your Kegerator – 6 Improvements!
• Serve Homebrew on Any Kegerator & Convert Commercial Kegerator to Homebrew
• Tips and Gear for Growler Filling
• What’s the Difference Between Ball Lock Kegs and Pin Lock Kegs?
• Checking for Draft System CO2 Leaks – Using The Pressure Gauge Method
• Tip: Consider Oetiker Stepless Clamps for Kegerator Gas and Beer Lines
• Hands On Review: Inkbird ITC-308 Dual Stage Temperature Controller +WiFi Version
• Universal Poppets Tips and Tricks!
• Convert Your Mark II Keg & Carboy Washer to a Recirculating Draft Line Cleaning Pump!
• Step by Step: Finding and Fixing Keg CO2 Leaks
• Kegerator Beer Line Temperatures & Reducing Foam with a Recirculating Fan
• Kegging CO2 Use Estimations and Calculations
• Step by Step: Balancing Your Kegerator Draft System
• Building a Simple Ball Lock Draft Line Flushing Setup
• Build a Recirculating Draft Line Cleaning Pump
• Home Brew Keg Roundup – New & Used, 5 and 2.5 Gallon & More!
• Damp Kegerator? Fix Kegerator Condensation
• Portable Draft Beer Serving Options!
• Homebrew Temp Controller Roundup! – Kegerator and Fermentation – concepts, applications and models
• Bulk Keg Orings and Keg Repair Part Numbers