SAKURA-Zentangle Set. Practice the Zentangle method with this great set. Included are a pencil and pens plus Zentangle tiles upon which you can create fun and relaxing art. There are three pens each with different tips sizes (.25mm, .35mm, and .45mm) and the micro pigment ink is waterproof, fade proof, and acid free. The pencil is pre- sharpened and the drawing tiles measure 2-1/2x3-1/2 inches. This package contains three pens, one pencil, and five Zentangle tiles. Conforms to ASTM D-4236. Pens imported, pencil and drawing tiles made in USA.