Description : Acrylic paint pen with water - based paint ink , Acid - free ; Fast - drying , Environmental tasteless These acrylic paint markers work on most surfaces , you can use to create your masterpieces on paper , chalkboards , canvas , wood , brick , stone , glass , mirrors , windows , metal , plastic , fabric , etc . Perfect for arts and craft projects , industrial use or marking tools , parts and other applications , fit for indoor and outdoor use Designed with round tips , 2 - 3mm smooth line , easy to control flow , good for semi - bold medium - weight lines and larger details painting Also good gift for artists , art students , teens and adults Specification : Material : Plastic Ink Color : Brown , Blue , Purple , Green Size : Approx . 14 x 1 . 2 cm / 5 . 51 x 0 . 47 inch Package Includes : 4 Pieces Permanent Markers Acrylic Paint Pens Note : Please allow a little size error due to manual measurement . Please be reminded that due to lighting effects and monitor &# 39 ; s brightness / contrast settings etc , the item &# 39 ; s color may be slightly different from the pictures . Please understand .