<https://www.foravida.nl/product/4-rail-glazen-schuifwand-antraciet-van-3280-mm-breed-en-een-werkhoogte-van-2000-mm/#product>
<http://schema.org/description>
"Kleur: antraciet\r\n \tInbouwhoogte: 1980 - 2010 mm\r\n \tLengte railsysteem: 3280 mm (4 sporen)\r\n \t4 glazen schuifdeuren van 820 mm"
<https://www.foravida.nl/product/4-rail-glazen-schuifwand-antraciet-van-3280-mm-breed-en-een-werkhoogte-van-2000-mm/>