Grodan mini block, MM 40/40, fits in item 102819, 4 x 4 cm, 1 strand of 15 pieces.

Growing plants on Grodan blocks is child's play; the blocks fit perfectly into each other. The Grodan Single Block System (SBS) and the AO cultivation blocks fit into all available culture blocks (DM4G, DM6.5G or item no. 4070). Please always select the correct hole size (27 or 40 mm). The culture blocks are then placed either on mats, in other substrates or directly into the breeding system (e.g. ebb and flow table or NFT system). 150 strands/box

• Growing plants on Grodan blocks is child's play; the blocks fit perfectly into each other.

• The Grodan Single Block System (SBS) and the AO cultivation blocks fit into all available culture blocks (DM4G, DM6.5G or item no. 4070). Please always select the correct hole size (27 or 40 mm). The culture blocks are then placed either on mats, in other substrates or directly into the breeding system (e.g. ebb and flow table or NFT system).