This is the only O-ring that I've found works on both of my pin lock kegs. All the lid O-rings that I've purchased from AIB were a whitish colored O-ring and somewhat squishy. I tried the harder black O-rings I bought from somewhere else and found out that the plastic they were made of was too hard to form a proper seal on my used kegs. Placed with a quick order with AIB and solved the problem. Cheers!
These new thicker white gaskets are excellent. They hold their shape/thickness and almost always completely seal first time. I recommend buying some spares at this price!