Grodan Delta Big Mama Block 8 in x 8 in x 8 in Gro-Blocks™ are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro-Block™. Small plants can be fully grown in our larger Gro-Blocks™. Holes are perfect size for any 1.5 in starter plug.

Y Connector, 8" x 8" x 8" Made from strong galvanized steel construction, these Y connectors allow you to split ventilation into multiple areas with one fan. Using a Y-connector gives you double the possibilities—you can split a length of ducting into