Zebra 斑馬牌 - Double Sided Flexible Highlighter Pen - MILD DEEP GRAY 深邃灰色- WKT7-MDGR X 2
https://www.friendstore.com.hk/shop/wkt7-mdgr-zebra-ban-ma-pai-double-sided-flexible-highlighter-pen-mild-deep-gray-shen-sui-hui-se-wkt7-mdgr-x-2-10686
https://www.friendstore.com.hk/web/image/product.template/10686/image_1920?unique=8deacbd
Line Thickness: Bold - 4mm, Fine - 1.0-1.4mm