While repairing a stuck valve on a Weber gas grill, I lost the small internal spring that returns the large control knob to its original (off) position. Weber will sell me a complete gas manifold with valves for about $120. I didn't want to spend that kind of money to fix a 10 cent spring problem. The second of the smallest springs in this set fits almost perfectly and the stick rises to the off position. I now have 224 springs for any future problems I encounter.