The most recent widely used batch, 3R4F, has generated a great number of important insights but as the available stock diminishes, a new mixture is needed. This newest batch is named 1R6F. An in-depth comparison of 3R4F to 1R6F cigarettes finds that 1R6F cigarettes are a suitable substitute for 3R4F in research applications.
Learn about the differences that should be considered when moving to the 1R6F cigarettes
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