8 books (32 cells in total) of compact, Sherwood root trainer root trainer cells.These are the loose books only - no lids or frames.
With the use of a root trainer plants develop more quickly and the use of 'air-pruning' forms vigorous and strong roots. Roots grow straight, avoiding pot-bound plants. Cells open for easy removal of plugs with damage-free roots. Can be used again and again - extremely cost effective.