1.125 to 1.25 inch valve spring for 2k autococker valve chamber? Used, one included. These are various tensions and will work with later Autococker valve chambers (with a larger valve). They will also work in nelsons but will result in a more compacted spring tension, for a valve that will open less. Multiples available, one included, all differ slightly. Various tensions, no color, some light, some hard
