Note:1. The difference between fine & chisel tip - Fine point is more writing with a pen, small and smooth lines. And Chisel is like permanent markers, wide lines great for bug bold text.2. The line width: 0.039-0.079 inch3. The magnetic cap cannot attach to magnetic glassboard, since glass can weak magnet. But it is ok to magnetic whiteboard & mirror, refrigerator and magnetic calendar.4.Easy to clean up, won't stain hands and dark clothes, but there may be a little smears on the light clothes.The set includes:12 pack black dry erase markers-Fine tipPackage size: 5.5*2.8*1.18inch, Weight: 3.18ozMarker size : 5.4*0.7 inch, Weight: 0.3ozWorry-Free Warranty: All DealKits products are backed by our 45-Day Money Back Guarantee and 24-Month Product Replacement Warranty. Please feel free to contact seller for any product or order problem.