Check the listing for details. Grodan Mini Blocks 45 Pack, 1.5"x1.5" Rockwool Stonewool Cubes (105 Available!). Condition: New. Listed at 50.00 USD. The Grodan Mini Blocks 45 Pack consists of 1.5"x1.5" Rockwool Stonewool Cubes, perfect for hydroponic gardening. Made by the reputable brand GRODAN, these cubes provide a stable and supportive environment for your plants to grow. The material basis of stone wool ensures optimal drainage and aeration for healthy root development. With 105 cubes available, this pack is ideal for those looking to expand their indoor garden or start a new hydroponic setup. Each cube is conveniently packaged in a box for easy storage and transport. These packs have been in storage for quite sometime. They were unused- still in their new packaging sleeves. Please see pictures to assess condition. Sold as is where is no warranty nor returns accepted for these.