The SFH contacts, which are designed to accommodate a wire range of 22AWG to 30AWG, are tin-plated over a phosphor bronze base material. The box construction ensures stable contact performance, redundant contact points, positive electrical contact, and low contact resistance at all times even when subjected to vibration and distortion. The suggested wire strip length is 1.7mm. Crimp heights vary by wire size, 0.56mm (30 AWG) to 0.78mm (22 AWG).