Azor Signal Mega Marker Pen - This pen can be used to mark your buoys even when they are wet.   - Suitable for marking on wet or damp surfaces.   - Permanent marker with non-toxic ink, fast-drying, and waterproof.   - Ideal for marking glass, porcelain, metal, fabric, plastic, cardboard, etc.   - The pen has a 6mm fine tip.   - To be used in well-ventilated areas.   - Store with the cap on when not in use.