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

These are re-conditioned 5 gallon ball lock soda kegs. They are sometimes called “corny kegs” because of the manufacturer, Cornelius, but they can be made by several manufactures including Firestone, AEB, and others. These kegs have been cleaned and pressure tested using the following process:

• Rinsed out with water on the inside and sprayed on the outside.
• Soaked in a hot “Brew Clean” solution for about an hour with poppet valves depressed to fill dip tubes with cleaning solution. Then re-rinsed.
  The keg is then pressurized and soap tested for leaks, then left for several days and re-tested for pressure before shipping.
• If you keg has a “sweet” smell when you open it this is normal. This smell comes from the residual “Brew Clean” cleaner, NOT from soda. Just rinse the keg and sanitize again before kegging.
• These kegs ship under our flat rate shipping (some of our competitors exclude kegs from free or reduced flat rate shipping programs).
• These kegs come with their original O-rings AND a new set of O-rings at no additional charge (some competitors charge up to $3.99 for this new set of O-rings) This O-ring set includes Lid O-ring, two post O-rings and two dip-tube O-rings.

• Commentary: Pin Lock Keg Pricing and Availability
• Check Your CO2 Regulator for Leaks!
• How to get a keg ready for first use? New Keg Cleaning and Prep
• Portable Draft Beer Serving Options!
• Pin Lock Keg Pricing and Availability
• 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 Beer 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 Temperature Probe Placement – To Immerse or Not To Immerse? – three tests to determine optimal pla…
• Kegerator Beer Line Temperatures & Reducing Foam with a Recirculating Fan
• Kegging CO2 Use Estimations and Calculations
• 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
• Homebrew Temp Controller Roundup! – Kegerator and Fermentation – concepts, applications and models
• Bulk Keg Orings and Keg Parts Reference