Check the listing for details. Ruling Pen Masking Fluid for Gouache Watercolour Painting Tool. Color: Green, Condition: New. Listed at 6.11 USD. Description : pen is commonly known as the duck bill pen , also is the drawing tool used the ink line drawing . Mainly used for comics frame , , background depiction . The adjusting screw on the pen tip can be adjusted according to the width of the drawn line . Drawing with a straight line pen is more straightforward than use a pen . After use the pen , the remaining ink should be wiped cleanly , and the adjustment screw should be loosened to avoid the phenomenon of the deformation of the pencil . Specification : Material : Metal Length : Approx . / 4 . 92inch How to use : ( 1 ) When add ink to the pen , it needs add ink to the pen , and the straight pen cannot be directly inserted into the ink bottle . ( 2 ) The pen tip should be directly facing the drawn line in the vertical plane of the direction of the pen , so as to ensure that the two touch the paper at the same time , and slightly tilt the pen towards the direction of the pen to uniform speed . ( 3 ) The surface of the is stained with ink and should be cleaned in time to avoid contamination of drawings when drawing lines . ( 4 ) After the is used , the remaining ink should be wiped cleanly , and the adjusting screw should be loosened to avoid the phenomenon of the deformation of the pencil . Package Includes : 1 Piece Ruling Pen Note : 1 . Please allow a little difference between the real item and the pictures due to monitors difference . 2 . Please allow some measurement errors . SKU: DJY0037387459018541 Shipping And Handling Policy The buyer is responsible for any applicable import duties and local taxes. Please verify with your customs before making your purchase. Please verify your address during checkout. We are not responsible for any wrong or undeliverable addresses. People always bought together with