; (B) by striking Free and inserting 2.4% ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (80) Baby stroller systems Heading 9902.17.14 is amended— (A) by amending the article description to read as follows: Baby strollers, each with chassis presented with removable seat and removable bassinet, with the seat designed to be attached to the chassis base plate, with the seat backrest designed to allow a child to be in a reclining position or to be supported at varying backrest angles; the foregoing not including any such stroller with a tilting or tilted seat only (provided for in subheading 8715.00.00) ; (B) by striking Free and inserting 2.6% ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (81) Iron head golf clubs Heading 9902.17.59 is amended— (A) by amending the article description to read as follows: Golf club heads designed for clubs designated as 1-irons, 2-irons, 3-irons, 4-irons or 5-irons (provided for in subheading 9506.39.00) ; (B) by striking 1.0% and inserting 2.1% ; and (C) by striking 12/31/2020 and inserting 12/31/2024 . (82) Golf club iron heads of 6-irons and 7-irons Heading 9902.17.62 is amended— (A) by amending the article description to read as follows: Golf club heads designed for clubs designated as 6-irons and 7-irons (provided for in subheading 9506.39.00) ; (B) by striking 1.0% and inserting 2.9%