1) Straight line length 2.5 meters; the spring length is about 25 cm; it can stretch about 1.25 meters. 2) Straight line length 5.0 meters; the spring length is about 50 cm; it can stretch about 2.5 meters. 3) Straight line length 7.5 meters; the spring length is about 75 cm; it can stretch about 3.75 meters. 4) Specifications: conductivity, low resistance, easy to welding, connect, cut and separate. Key benefits Provides clear length and extension specifications for reliable installation and planning. Multiple length options (2.5 m, 5.0 m, 7.5 m) cover a range of installation needs with corresponding spring lengths and stretch capabilities. conductivity and low resistance support efficient electrical performance in connections. Easy to weld, connect, cut and separate facilitates quick fabrication, modification, and . The spring element delivers controlled extension within the stated maximum, supporting flexible configurations without excessive slack. Use scenarios Electrical test rigs and lab setups where a flexible, extendable lead is required to reach equipment while keeping a compact base length. Workshop or field service applications that demand adjustable conductor length with easy modification for temporary or portable power and signal paths. Manufacturing or assembly environments that benefit from quick adaptation of conductor length, onsite cutting or joining, and straightforward reconfiguration. Notes The information retains the original model distinctions and functional capabilities: defined straight line length, corresponding spring length, and maximum stretch for each option, plus the stated material and performance characteristics.