Weltek Navitek Weltek Airkos Replacement Pre-Filters For PAPR Systems

REPLACEMENT PRE FILTER FOR WELTEK AIRKOS BLOWER UNITS Replacement / spare pre filters (Pack of 10) for use with Weltek Airkos blower units used with Weltek air fed welding and grinding helmets. Filters should be changed when the Airkos clogging alarm sounds or when the user deems appropriate.  The pre filter job is to extend the life cycle of the main particulate filter.