Fits for Force 8 & Force 10 Mask. The Force8™ PressToCheck™ filters you can instantly check that you have the correct seal every time. These are PressToCheck™ ABEK1P3 multi-gas, vapour and dust replacement filter pair. FIT IT! Don the Mask - Put the straps and harness over your head and pull the straps to a suitably tight and comfortable fit. PRESS IT! PressToCheck™ - Press the front and backs of both filter covers together to stop air from entering through the filters. CHECK IT! Inhale - No air should come through the mask. Adjust the mask and repeat until it doesn't. Release when seal is made.