Don't be fooled by imitations or counterfeits with low-quality spring systems that provide poor, unreliable connections. The SBAN has been in reliable service for decades. A nickel-plated beryllium copper spring provides consistent pressure with high electrical conductivity. Designed to provide 100% electrical continuity within the solder interface with all 8,16 and 24 wire Kimber models. When terminated in house, we use high silver content solder under a protective nitrogen gas curtain for the utmost quality and performance. Each pair comes complete with silver solder and Kimber HeatShrinks.