Product Details: Capacity: 3 pens per box, 5 ml per pen Product Dimensions: 11*4*1.5cm / 4.330*1.57*0.59 inches Features: Our wood burn mark pens contain polyurethane and acrylic polymers. They can be used for small wooden signs or intricate patterns, recording your designs on wood forsurfaces. The method of use is simple: smooth the wood forsurface with sandpaper, shake well before use to adjust the moisture content of the paper, draw the design on the wood forsurface, and heat the design with a heater to create burn marks. This allows you to mark the wood. Product Includes: 1 box of 3 wood burn mark pens Note: Please allow slight dimensional errors due to manual measurement (1~2 cm / 0.39~0.78 inches), the actual size received shall prevail; please allow slight color errors under different monitors.