These were just what I needed to get two of my old leaky Taprite regulators refurbished and back into service. Although these may perform better and last longer than the factory seals (Buna-N I think), going forward I will likely buy these and replace them each time I swap my 20 lb. tanks out.

Perfect fit and easy installation.

They were perfect for what I needed. Thank you very much

Once I learned to loosen the internal bolt with a hex-key (Allen wrench), it was each to loosen the bolt, remove the old O-ring, and drop this new one into place. Like the original one that came with my Taprite regulator, this one is flat on the top and bottom and fits securely into the O-shaped cavity for it. Seals well, too.