Cultiwool 3" x 3" x 3" Blocks of Cultilene Rockwool - Case of 400Description Cultiwool 3" x 3" x 3" Block (400 Blocks Case) Cultilene: Cultilene's growing blocks are uniquely efficient. This efficiency is attributed to the consistency of our products. Quick and easy absorption of water and the equal distribution of water throughout the substrate is a vital feature of a growing medium. High Quality Stone Wool: Not only can users expect top quality stone wool in the market, but Cultiwool is also proud to introduce