Features: High sensitivity sensors detects real time line tension changes with 50% faster response, delivering instants bites alerts for precise fishing control in both still and flowing waters. Features bright sun resistant colors for 30% better visibility, combined with durability ABS stainless steel construction that withstands 2x more impacts than standard fishing sinkers. Ideal for serious anglers requiring reliability gear during extended fishing, outdoor adventurers prioritizing portability (20g), and families seeking user friendly fishing tools. Performs exceptionally in daylights lake fishing, riverbank excursions, and casual group outings where quick detach installation saves 70% setup time without tools. Engineered with streamlined ergonomics to minimize tackle bulk while maintaining 360 degrees rotational stability, ensuring smooth casting and reduced line tangles during active fishing maneuvers. Specifications: Dimension:33cm/12.9in Component:ABS+ stainless steel Package Includes: 4pcs European carp fishing counterweights rockers note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.