Features: Engineered with high purity copper alloy, this streamlined inverted fishing sinkers ensures precise weight for superior bottom stability in saltwater and rock fishing while addressing environmental concerns caused by traditional weights. Featuring an electroplated finish, the copper construction offer longer service life than standard component, maintaining performances even in harsh seawater conditions. Ideal for anglers and families, its rounded edges and easy installation cater to both competitive fishermen and beginners, including child friendly fishing activities. Optimized for long cast setups in diverse environments – from shores to freshwater lakes – its hydrodynamic inverted shape reduces water resistance by 20% for extended casting ranges. The innovative inverted design combines aerodynamic efficiency with practical safety, protect fishing lines and hands while adapting seamlessly to various rigs configurations. Specifications: Component: Copper Alloy Weight: 1.8/3.5/5/7/10/12g Size: 1.8: 1.3x0.5cm/0.51x0.2in 3.5: 2x0.55cm/0.79x0.22in 5: 2.5x0.6cm/0.98x0.24in 7: 2.5x0.7cm/0.98x0.28in 10: 2.8x0.8cm/1.1x0.31in 12: 3.1x0.85cm/1.22x0.33in Package Includes: 10pcs Fishing Weight Sinkers note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.