B00TYOZYKE 3M Versaflo Prefilter TR-6600/37354(AAD), for TR-600 PAPR

The TR-6600 prefilter can extend the service life of the particulate (HE) element of TR-600 series filters and cartridges by capturing large particles that may otherwise clog the HE filter. Frequent prefilter changeout may help optimize PAPR system performance.
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May reduce operating costs by extending the life of TR-6000 series filters and cartridges
#378,836 in Automotive (See Top 100 in Automotive) #539 in Plasma Cutting Equipment
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3M
11.4 x 8.9 x 6.6 inches; 0.32 Ounces