This is a white, FDA food grade, silicone O-ring designed for your ball lock keg's lid. I had this specially-made in white so you could tell it was silicone.
I only sell silicone O-rings because they are all I use. They withstand a lot more abuse than the Buna N O-rings most kegs have, and there's nothing worse than your keg springing a leak in the middle of a shift because a gasket failed. The heat of a keg washer will degrade Buna N rapidly, but silicone gaskets can withstand much higher temperatures.
I recommend changing these once a year. See my video on keg gaskets for complete information on gaskets.
I only sell silicone O-rings because they are all I use. They withstand a lot more abuse than the Buna N O-rings most kegs have, and there's nothing worse than your keg springing a leak in the middle of a shift because a gasket failed. The heat of a keg washer will degrade Buna N rapidly, but silicone gaskets can withstand much higher temperatures.
I recommend changing these once a year. See my video on keg gaskets for complete information on gaskets.