the following new heading: 9902.11.79 Strips wholly of expanded poly(tetrafluoroethylene) (PTFE) (CAS No. 9002–84–0), noncellular, with adhesive backing, of a thickness greater than 3 mm but not over 30 mm, presented rolled in spools, certified by the importer as having a tensile strength of 24.1 MPa (3,500 psi) or higher per American Society for Testing and Materials (ASTM) F-152 (provided for in subheading 3916.90.50) Free No change No change On or before 12/31/2020 . 1064. Plastic tubes, not reinforced, polyvinyl Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.80 Insulated tubes of plastics, not reinforced, without fittings, presented in the form of hose, the foregoing tubes having polyethylene pipes inserted therein and suitable for use in hot water supply or heating systems (provided for in subheading 3917.32.00) Free No change No change On or before 12/31/2020 . 1065. Polyethylene micro-tubes Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.81 Polyethylene micro-tubes, having an interior diameter of 0.01 mm and wall thickness of 0.05 mm (provided for in subheading 3917.32.00) Free No change No change On or before 12/31/2020 . 1066. Plastic, other fittings Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.82 Plastic elbows, holding pins, bend supports, anchor clips, staples of a kind used in construction applications (provided for in subheading 3917.40.00) 5.1% No change No change On or before 12/31/2020 . 1067. Transparent polypropylene flat film Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.11.83 Transparent polypropylene coextruded flat film in rolls with a thickness between 162-198µm and a width between 396-398 mm (provided for in subheading 3920.20.00) Free No change No change On or before 12/31/2020 . 1068. Acrylic poly methacrylate Subchapter II of chapter 99 is