Replacement filters for model# 50, 50SL and all portable units.

Kit contains 1- Stage One filter, 2- Stage Two filters, 4 Stage Three filters, 4- Stage Four filters.

A whole years supply in one box.

MARTECH 85890 - Replacement filter kit - In order to properly maintain your Martech Services Company products, it is imperative that you replace the filters, on a regular basis.

Each product has a suggested filter change out schedule that is outlined in the owner’s manual.

Failure to change filters as necessary, may result in permanent damage to the product, but more importantly can cause serious illness or injury to the user of the product.

KIT CONTAINS 11 FILTERS IN TOTAL.