Expanding the versatility of your respiratory system by stacking multiple filtration layers is the core objective of this specialized hardware component. The Moldex 7927 Semi-Rectangular Piggyback Adapter permits workers to stack a particulate disk securely on top of their primary chemical cartridge, instantly building a custom dual-threat barrier. Paint teams, agricultural sprayers, and remediation specialists rely on this modularity to ensure their airways are completely isolated from overlapping worksite hazards like toxic gases and floating dust.The precision-molded plastic locks firmly into the existing bayonet grooves, ensuring the additional filter layer will not rattle or break its airtight seal during sudden head movements. Designed to maintain an exceptionally low profile, it prevents the combined respiratory setup from feeling bulky or obstructing your downward visual field. This crucial connecting piece empowers industrial workers to tackle the most complex, multi-layered environments with total confidence. The Moldex 7927 Semi-Rectangular Piggyback Adapter is a vital accessory for maximizing the functionality of your existing cartridges. Connects particulate disks to chemical cartridges Compatible with 7740, 7740+, or 7910 filters NIOSH, MOL, and SAI approved Meets 42 CFR part 84 Low-profile modular design Secure bayonet-style locking ABNT NBR 13694 6 ABNT NBR 13696 ABNT NBR 13695 AS/NSZ 1716:2012 42 CFR part 84 Reusable and durable construction 100% PVC-Free