Comparison : |
Item # E5328, E- Series 2.5 X 6" granular activated carbon Item # E5385, E- Series 2.5 X 6" all polyphosphate Item # E5320, E- Series 2.5 X 6" 1 micron carbon block Item # E5320-P, E- Series 2.5 X 6" 1 micron carbon block with polyphosphate Item # E5485, E- Series 2.5 X 8" all polyphosphate
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