1126091–34–6) (provided for in subheading 3904.69.50) Free No change No change On or before 12/31/2020 . 970. Solvene Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.83 1,1,2-Trifluoroethene - 1,1-difluoroethene (1:1) (Vinylidene fluoride-trifluoroethylene copolymer) (CAS No. 28960–88–5) (provided for in subheading 3904.69.50) Free No change No change On or before 12/31/2020 . 971. Solvene T Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.84 Poly(1,1-difluoroethene-co-1-chloro-1,2,2-trifluoroethene-co-1,1,2-trifluoroethene) (CAS No. 81197–12–8) (provided for in subheading 3904.69.50) Free No change No change On or before 12/31/2020 . 972. Solvera / Fluorolink PT5060 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.85 Mixtures of approximately 25 percent propanoic acid, 3-hydroxy-2-(hydroxymethyl)-2, methyl polymers with 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane and reduced methyl esters of reduced polymerized, oxidized tetrafluoroethylene, compounds with trimethylamine (CAS No. 328389–91–9), less than 1 percent 2-propanol (CAS No. 67–63–0) and less than 1 percent 2-butanone (CAS No. 78–93–3), remaining content water (provided for in subheading 3904.69.50) Free No change No change On or before 12/31/2020 . 973. Galden fluids with boiling points above 170 degrees Celsius Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.86 Perfluoropolymethylisopropyl ether having a boiling point above 170 degrees Celsius (CAS No. 69991–67–9) (provided for in subheading 3904.69.50) Free No change No change On or before 12/31/2020 . 974. Fomblin W 500 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.10.87 Mixture of poly(1-[difluoro(trifluoromethoxy)methoxy]-1,1,2,2-tetrafluoro-2-(trifluor omethoxy)ethane) (CAS No.