Sevencolor Large Size 15mm Liquid Chalk Marker Pens Colored Ink 8 Pack, 3 in 1 Tip for Advertising, Signboard, Window, Glass Cup, Office & School Supplies REVERSIBLE TIPS FOR CHANGE DRAW STYLE - Tip feature of liquid chalk marker pens from SEVENCOLOR: 3mm and 6 mm marker pen with unique reversible tip (bullet and chisel),while the larger size 8mm,10mm and 15mm pen's tip are 3 in 1 tip which allows users to draw both thick and thin lines in 8 fluorescent color that will not drip, smudge, or fade BRIGHT NEON COLORS - SEVENCOLOR 8 pieces chalk marker using high brightness fluorescent ink,words and pictures are very bright,especially at night,with the use of LED fluorescent board,your advertising can be more attractive to the buyers and passers-by SUPER EASY TO WIPE - Belong to water based marker,writing smoothly,easy to clean,both dry erase or wet erase are OK,the writing content by SEVENCOLOR liquid chalk marker pens can be changed many times SAFE AND ECO-FRIENDLY - SEVENCOLOR liquid chalk markers are non-toxic,dust-free and washable,conform to ASTM D-4236 and the EN71 standard,no harm to your body,get rid of allergies,you can use them safely,quite good to kids health! HIGH QUALITY MARKER- We only offer marker pen with fine tip,non-toxic ink,bright color,quality is our faith.Best used on: LED writing board,Sign,Menu boards,Window,Chalkboard labels and other non-porous surface,blackboard is not recommend.Ideal for home use,restaurant advertising,school projects,commercial promotional activities and more!