15.2 ounces

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• 

  4 Inch Redrock Rockwool PRO Grow Block for Hydroponics | 6 Pack + Twin Canaries Chart

  $16.99 Buy product
• 

  Grodan Rockwool Delta GRO Blocks | 4″ Cube – Pack of 6 | + Twin Canaries Chart

  $18.99 Buy product