SAKURA-Identipen. Assorted 8-pack includes (1 each): red green brown purple royal blue orange yellow black. This pen is determined to do the job and is built for heavy use. Dual-point: tough fiber fine point on one end and extra fine point for detail on the other. Great for metal glass tools sporting goods test tubes photographs plastic wood DVD's and CD's. Permanent ink; waterproof on most surfaces; low odor. Alcohol based cleaners will remove ink from non-porous surfaces.