Here's what other sites are saying:
Introducing the new family of titanium Simmer Rings for the 12-10 stove! Trail Designs has been working for the past 5 years perfecting this deceptively simple design. The Simmer Rings are constructed of titanium and have a very subtle conical shape that allows them to restrict air from the top by providing a near seal against the stove body right above the air inlet ports, and flaring out slightly to the primer pan where they control air flow against that surface.
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