The balloons in the R series are heavy-duty reinforced with rods. They are manufactured in such a way as to provide greater strength and durability. The marking tools for ocean, sea, river, lake, and beaches are popular among professional fishermen and gillnet fishing. Known for their durability, these balloons are ideal for recreational boats, suitable for anchoring and protection against impacts during mooring. They are made from a single piece, meaning all parts are joined, and feature a consistent wall thickness resistant to ultraviolet radiation.