;1RS,3SR)-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropanecarboxylate (β-Cyfluthrin) (CAS No. 68359-37-5) (provided for in subheading 3808.91.25) Free No change No change On or before 12/31/2020 . 809. Flupyradifurone formulations Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.09.20 Product mixtures containing 4-{[(6-chloro-3-pyridinyl)methyl](2,2-difluoroethyl)amino}-2(5H)-furanone (Flupyradifurone) (CAS No. 951659–40–8) (provided for in subheading 3808.91.25) 4.3% No change No change On or before 12/31/2020 . 810. Imidacloprid + β-cyfluthrin formulations Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.09.21 Product mixtures containing 1-(6-chloro-3-pyridinyl)methyl-N-nitroimidazolidin-2-ylideneamine (Imidacloprid) (CAS No 138261–41–3) and (RS)-α-cyano-4-fluoro-3-phenoxybenzyl (1RS,3RS