Cultiwool 8" x 8" x 8" Blocks of Cultilene Rockwool - Case of 18Description Cultiwool 8" x 8" x 8" Block (18 Blocks Case) Cultiwool 8" x 8" x 8" Block (18 Blocks Case): Cultiwools' growing blocks are unique in the most efficient way. That has everything to do with the consistency of the products. Quick and easy uptake of water and the homogeneous distribution of water throughout the substrate are one of the most important features of a growing medium. Not only can you expect the highest quality stone wool in the