3M™ Prefilter Holder 501

3M™ 501 filter holder is required when combining 6000 series filters with 5000 series particulate filters.
5000 series particulate filters can only be used independently when paired with the 603 and 501 holders.
They can be used with the 3M™ 5000 series filter. They allow gas and vapor filters to be extended with particulate protection.

2 pieces per package