This is a third brake light specifically designed for Leer truck caps. This new style light was implemented by Leer in 2015 and is found on their 2016 and newer Toyota Tacoma caps, 2015 and newer F150 caps, 2019 and newer Chevy/GMC caps and 2019 and newer Ram caps. The part number is 136501. It measures almost 16" across the bottom, has angled sides and is about 1 3/8" top to bottom on outer lens. The sale includes the two mounting screws, foam gasket, attached wire harness and inner mounting box.