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

18+ Liter Ball Lock Keg | Fully Remanufactured (AEB/SAFER/Cornelius)
These are top-tier, refurbished Corny kegs made of stainless steel. With stainless steel costs climbing and high-quality used kegs becoming increasingly scarce, this is an offer you won’t want to overlook.

Every keg in our collection undergoes a comprehensive refurbishment process. This includes deep cleaning, machine polishing, and the replacement of o-rings on the lid, PRV, as well as liquid and gas dip tubes, in addition to two o-rings on each post. These kegs are all sourced from elite brands, including AEB, SAFER, and CORNELIUS.

Additional Information on Our Refurbished Kegs:
Though these kegs are pre-owned, they may exhibit minor cosmetic imperfections such as small dings and scratches that couldn’t be completely polished away. None of these issues impact their functionality.

After the cleaning and polishing operations, some residue might be present on either the keg’s exterior or its rubber components. While it may transfer onto your hands, this is merely a reminder that all kegs—whether new or used—need to be meticulously cleaned before usage. Proper sanitization is also crucial before filling them with any beverage.

A subset of these kegs has experienced sun damage to the rubber areas, affecting the seal. This could lead to the formation of black marks, particularly when the rubber is wet, although this is less likely when it’s dry.

Lastly, you might find some kegs with double o-rings on their posts. While this may appear out of the ordinary, rest assured they function as effectively as those with single o-rings.

Diameter: 8-7/8″ (225mm)
Height: 22-1/4″ (565mm)
Weight: 9 lbs 9oz (4.34kg)
Volume: 4.75 gallons (18 liters) but some are also slightly more in full volume
Post Thread Size: 9/16-18 UNF Thread on both the IN and Out.