Organic gas filter class A1, suitable for use with R7500 MaxiGuard Silicone Half Mask and R680 & R690 MaxiGuard Silicone Half Mask. Certified to AS/NZS 1716. Low profile twin filter design. Plastic polypropylene. No metal parts. Bayonet Connector ensures secure locking. Used against vapour from organic substances whose boiling point exceeds +65°C.