3M™ Qualitative Fit Test Apparatus Kit FT-30, Bitter (Bitrex) 3M ID 70070709640 The 3M™ Qualitative Fit Test Kit FT-30 Bitter is designed for fit-testing any negative pressure respirator e.g. 3M™ Disposable and Reusable Half Face Respirators. The 3M™ Qualitative Fit Test Apparatus Kit contains: a laminated instruction booklet, sensitivity solution, fit test solution,...