Material Body: Nylon66,Glass Filled UL 94-0 Rated,ColonBlack. Ejector: Nylon66, Glass Filled UL94-0 Rated, ColonNatural. Contact: Brass Contact Plating: Gold plating over Nickel on contact area, Tin Plating on Solder Tail. Mechanical; Ejector Normal Retention Force:4.5Kg Min. Contact Retention Force: 550 Grams Min. Per Contact Insertion Force: 140 grams Max. Per Mated Pair Contact Separation Force: 25 grams Min. Per Mated Pair Insertion Force: 13Kg Max. Separation Force: 2.3Kg Min. Electrical Specification Contact Resistance: 30 Milliohms Max. Initial Insulation Resistance: 1000 Megohms Min, At 500V DC Dielectric Withstanding Voltage: 1000V AC, One Minute Hold. Environmental Operating Temperature: -55°C to +105°C