What is the part number for the filter material in the side vent hoods of a NEMA 3R E-Flex drive?

Issue:
Part number for the filter material in the side vent hoods of a NEMA 3R E-Flex drive

Product Line:
E-Flex

Environment:
Nema 3R enclosures

Cause:
Require replacement filters

Resolution:
Per E-Flex manual, the 3R filter material is 31158-441-01.  Qty = 2 per E-Flex.

Since the E-Flex product line is obsolete, the manufacturing plant no longer procures this item.
Recommendation:
Standard foam filter material of 10 ppi (pores per inch) can be used.
This is available from a number of sources and can be cut to size.

Dimensional drawings are attached.

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