uni Singapore - uni Propus has a unique transparent window🔍 on its tip that allows you to see where you're highlighting✨✨! And it is a combo highlighter that has a 4.0 mm
![Amazon.com : uni Propus Window Double-Sided Highlighter Pen with 4.0 mm/0.6 mm Twin Tip, 5 Color Set (PUS102T5C) : Office Products Amazon.com : uni Propus Window Double-Sided Highlighter Pen with 4.0 mm/0.6 mm Twin Tip, 5 Color Set (PUS102T5C) : Office Products](https://m.media-amazon.com/images/I/61nKewU5AdL._AC_UF894,1000_QL80_.jpg)
Amazon.com : uni Propus Window Double-Sided Highlighter Pen with 4.0 mm/0.6 mm Twin Tip, 5 Color Set (PUS102T5C) : Office Products
![Uni-ball Propus Window Double-Sided Highlighter Light Colour - 4.0mm and 0.6mm - AQUA - awesomepens.co.uk Uni-ball Propus Window Double-Sided Highlighter Light Colour - 4.0mm and 0.6mm - AQUA - awesomepens.co.uk](https://awesomepens.co.uk/wp-content/uploads/2021/01/Uni-ball-Propus-Window-Double-Sided-Highlighter-Light-Colour-4.0mm-and-0.4mm-AQUA-1.jpg)