Bitrex Fit Test Kits no checkout Consistent tensile and even tear Consistent tensile and even tear in both cross and machine direction Heavy duty with extra powerful magnetic base Perfect for welding in awkard places Mounts and adjusts in seconds to bring hidden areas into full view Quick change replaceable mirror poly coated hood with clear viewing window Offers testing for disposable and reusable dust and mist respirators Bitrex creates an unmistakable bitter taste that indicates breakthrough on the respirator fit New disposable glass ampules make pouring solution into nebulizers easier and reduce the chance of contamination Reusable