; such fabric with weft yarns of polybutylene terephthalate (PBT) giving the fabric sideways stretch, with 31 or more but not over 36 single yarns per cm dyed light beige in the warp and 14 or more but not over 18 single yarns per cm dyed light brown in the weft (provided for in subheading 5407.53.20) Free No change No change On or before 12/31/2020 . 1181. Acrylic fiber tow with an average decitex of between 2 and 5 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.98 Acrylic fiber tow containing at least 85 percent but not more than 92 percent by weight of acrylonitrile units, containing a minimum of 35 percent by weight of water, presented in the form of raw white (undyed) filament with an average filament measure between 2 and 5 decitex per filament and an aggregate measure in the tow bundle between 660,000 and 1,200,000 decitex, with a length greater than 2 meters (provided for in subheading 5501.30.00) Free No change No change On or before 12/31/2020 . 1182. Acrylic filament tow with an average decitex of 2.2 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.12.99 Acrylic filament tow containing 85 percent or more by weight of acrylonitrile units and 2 percent or more but not over 3 percent of water, raw white (undyed), crimped, with an average decitex of 2.2 (plus or minus 10 percent) and an aggregate filament measure in the tow bundle between 660,000 and 1,200,000 decitex, with a length greater than 2 m (provided for in subheading 5501.30.00) Free No change No change On or before 12/31/2020 . 1183. Acrylic fiber tow with an average decitex of 3.3 Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.13.01 Acrylic fiber tow containing 85 percent or more by weight of acrylonitrile units and 2 percent or more but not over 3 percent of water, raw white (undyed), crimped, with an average decitex of 3.3 (plus or minus 10 percent) and an aggregate