To fit the 7700 North Respirator PM1.
These are for gas and dust - not for resin fumes. For resin fumes see below.
Sold individually - you need 2 filters per mask so order 2 of these for a complete set.
Other items in the North Range include:
7700 North Respirator PM1
North 7500 1U/5U A1 Resin Filters PM2
North 8U Gas / Dust Filters (not for resin fumes) PM6
Pack of 10 Pre-Filters and two filter holders (caps) PM8