(provided for in subheading 2805.30.00) Free No change No change On or before 12/31/2025 . 11015. Praseodymium (Pr) metal Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.15 Praseodymium metal (CAS No. 7440–10–0), whether or not intermixed or interalloyed (provided for in subheading 2805.30.00) Free No change No change On or before 12/31/2025 . 11016. Heavy rare earth metals, dysprosium (Dy) metal and terbium (Tb) metal Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.16 Dysprosium metal (CAS No. 7429–91–6), terbium metal (CAS No. 7440–27–9), and heavy rare earth metals, whether or not intermixed or inter-alloyed (provided for in subheading 2805.30.00) Free No change No change On or before 12/31/2025 . 11017. Scandium crystal Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.17 Scandium crystals of 99.9 percent purity containing 3 ppm or less by weight of cobalt, 80 ppm or less by weight of chromium and 500 ppm or less by weight of iron (CAS No. 7440–20–2) (provided for in subheading 2805.30.00) Free No change No change On or before 12/31/2025 . 11018. Hexafluorotitanic acid Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.18 Dihydrogen hexafluorotitanate(2-) (CAS No. 17439–11–1) (provided for in subheading 2811.19.61) Free No change No change On or before 12/31/2025 . 11019. Silica gel cat litter with tray Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.19.19 Cat litter of synthetic silica gel, not crystalline, imported with a disposable cardboard tray coated with polyvinyl chloride (provided for in subheading 2811.22.10) Free No change No change On or before 12/31/2025 . 11020. Dioxosilane spherical particles (mean particle size 0.046–0.054 mm) Subchapter II of chapter 99 is amended by inserting in numerical sequence