A version of Rumi Cult 40 that is 4 times stronger than the original formula. (This is an effort to reduce ever rising freight costs.) It is packaged in a 12.5 lb. bag, 4 per case. A 12.5 lb bag will replace 1 50 lb bag of Regular Rumi Cult 40. This product has additional enzymes added to enhance digestion of fibers and small grains. The extra enzymes will enable greater flexibility of what may be fed. RC Gold 4X has been formulated for use in organic production as well.