The 3M Fit Test Solution Refill is used to test the effectiveness of the face-to-respirator seal of any particulate respirator or gas/vapor respirator with a particulate pre-filter. It is used to supplement the 3M Qualitative Fit Test Apparatus Kit (#FT-10 or #FT-30). This refill will provide approximately 150 tests. Features 3M Fit Test Solution Refill Features Bottle Size: 55 mL. Can be used with any particulate respirator, or any gas/vapor respirator with particulate pre-filter. Convenient, reliable, easy to use. Two test agent options are available to determine employee's taste threshold to test solution. Configurations 3M Fit Test Solution Refill Configurations #FT-11: 1 Bottle Sensitivity Solution (sweet). #FT-12: 1 Bottle Fit Test Solution (sweet). #FT-31: 1 Bottle Sensitivity Solution (bitter). #FT-32: 1 Bottle Fit Test Solution (bitter). #FT-11-CS: 6 Bottles Sensitivity Solution (sweet). #FT-12-CS: 6 Bottles Fit Test Solution (sweet). #FT-31-CS: 6 Bottles Sensitivity Solution (bitter). #FT-32-CS: 6 Bottles Fit Test Solution (bitter). Literature 3M Fit Test Solution Refill Literature 3M Qualitative Fit Test Apparatus Brochure 3M FT-11 Sodium Saccharin Sensitivity Test Solution Safety Data Sheet 3M FT-12 Sodium Saccharin Fit Test Solution Safety Data Sheet 3M FT-31 Denatonium Benzoate Sensitivity Solution Safety Data Sheet 3M FT-32 Denatonium Benzoate Fit Test Solution Safety Data Sheet