Zebra Pen Corporation Highlighter, Zazzle, Chisel Tip, YellowZazzle Tank Highlighters feature a convenient, semi-oval shape to prevent rolling, The wide, plastic barrel has built-in ridges on the sides for full writing control, Striped cap is ventilated on the inside to keep the ink fresh, Vibrant ink is water-based with a dye, Nonrefillable highlighters also offer a chisel tip for narrow or broad strokes, SKU: DLRDY086608