기능

• This is a marker for water resistant blackboards.
• It doesn't run even if it rains.
• By using the marker for water resistant blackboard on the water resistant blackboard, the characters will not flow. You can take photos of construction records even on rainy days.
• Bold round center for smooth writing.
• Alcohol-based ink that can be easily wiped off with a cloth.
• A line width of 3mm that will show clearly in recorded photos.
• * Can not be used for ordinary blackboard.