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Ships within 48 hours · Estimated delivery Oct 3 - Oct 8
the 6604 SparkPlugs is NRR 33 (single-use foam)
confirmed against 3M and multiple distributors in August 2026
It fits hat sizes 6
95(i)(4) requires training on correct fitting — all four tips must seat fully to achieve rated NRR in closed mode
and electrical contracting on commercial and industrial projects with medium-voltage service
MSA GMD/P100 Respirator Cartridge — Ammonia And Methylamine/P100 (MSA Comfo) 1940 the 6604 SparkPlugs is NRREDITORIAL REVIEW: 4. 4 5WC Safety Review MSA GMD P100 Respirator Cartridge Best For: ammonia and methylamine with dust in one cartridge on MSA Comfo respirators. Not For: organic vapor, acid gas or formaldehyde. It covers ammonia and methylamine and particulate only. Bottom Line: the do it all ammonia and methylamine plus dust cartridge for the MSA Comfo system. If there is no dust, the gas only GMD is cheaper. Editorial assessment by Steven Eaton, WC
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