The dual point multipurpose marker leaves a permanent mark on most non-porous surfaces. One end is for details with an extra fine plastic point that won”t break down. The opposite end is for broader lines with a tough fiber point built for heavy use. Waterproof and writes on leather metal wood glass CDs plastic and photographs . Alcohol based cleaners will remove ink from non-porous surfaces. **Sakura of America prohibits customers from selling on Amazon or to unauthorized third party sellers to resell on Amazon. Brewer customers who disregard this policy may have purchase orders cancelled or accounts terminated.**