The Minicap fits on the Optimus 8 & 8R, Svea 123 & 123R, Primus 70 & 71, Optimus 80, Optimus 99, Radius 20 and 42, Primus/Optimus 96 & 97, French Vesta 1 & 2 burner stoves, all clones of any of these stoves, and other stoves with a small diameter burner bell. The cap will reduce the volume level of your small vintage stove by a substantial amount, maybe 1/2 of normal volume levels at high flame, more reduction at low flame. It also makes your stove a better simmering stove. BernieDawg Minicaps can be used with kerosene, Coleman fuel or isobutane canisters. It's the original silent multi-fuel damper cap for small-burnered stoves and it's still the best. Any other imitations you may see are unscrupulous copies of lesser quality.