30 PPI Filter Foam has larger cells than 45 or 60 PPI foam. This allows for more air to pass through.
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Reticulated Foam

1/4" Reticulated Polyether Foam, 30 PPI 48" X 108", 16 sheets
Case Cost $588.20
Reticulated Foam

1/2" Reticulated Polyether Foam, 30 PPI 48" X 108", 8 sheets
Case Cost $588.20
Reticulated Foam

3/4" Reticulated Polyether Foam, 30 PPI 48" X 108", 6 sheets
Case Cost $662.40
Reticulated Foam

1" Reticulated Polyether Foam, 30 PPI 48" X 108", 4 sheets.
Case Cost $588.20
Reticulated Foam

2" Reticulated Polyether Foam, 30 PPI 48" X 108", 2 sheets
Case Cost $588.20
Unit Price N/A