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 five pens with four tips sizes (.25mm; .35mm; .45mm; .5mm) and the micro pigment ink is waterproof; fade proof; and acid free. The pencil is pre-sharpened and the drawing tiles measure 3-1/2 inches square. This package contains five pens; one pencil; and five Zentangle tiles. Conforms to ASTM D-4236. Pens imported; pencil and drawing tiles made in USA.