KURETAKE-ZIG Laundry Pen. Use this indelible pen on fabrics and clothi ng for writing that you don't want to be erased by repeated washing. The alcohol-based dye ink writes clearly; is permanent on most surfaces and has a low odor. This package contains 48 Black Laundry Pens in a round display case: 5-1/2x4-1/8x4-1/8 inches. Conforms to ASTM D4236. Imported.