SCEF2.5-4.0 Contact Mating Area Plating Material: Silver (Ag) Contact Type: Socket Wire Contact Termination Area Plating Material: Tin over Nickel Contact Retention Within Housing: With Contact Retention Type Within Housing: Locking Spring Silver (Ag) Socket Tin over Nickel With | Bpsc Stacked Hybrid Connector: Male Female Contact & 7-12 Awg | Part Number: T2220002040-001 | Internal Number: T2220002040-001 | TE Connectivity |