https://www.etiden.com/EN/3210-900022g-unitech.html36947X strap with optical pencil support (TB162 / TB170)X strap with optical pencil support (TB162 / TB170)https://www.etiden.com/media/catalog/product/cache/8e0900980d802d9bb649187a089d520a/3/2/3210-900022g.jpg19.07instock21.5519.07122.48Unitech000https://www.etiden.com/media/catalog/product/3/2/3210-900022g.jpg36932/Unitech2022-12-02T15:40:42+0000