Package Included:all is included in the first photo.Contact Material:Silver Copper.Rated Current (Amps):120 A.Rated Voltage (Volts):600 V.Contact Barrel Wire Size [AWG]:2/4/ 6AWG (1 3.3 mm - 21.1 / 33.6mm).Average contact resistance (micro ohm):140.Insulation withstand test voltage (Volts AC / DC):2200V.Contact retention force ( lbf):100lbf No load (contact/disconnect cycles):At 10,000.Under load (Hot Plug 250 cycles @ 120V).Average insertion force (pounds):20lbf.Operating temperature C: -20to 105.Housing material flammability class:UL 94-V0.Good material: The product is made of good materials, continuity is perfect, resistance to bad environment. The self-erasing makes the push needle surface clean, low contact resistance is reliable. The connector can be used in strong shock environment and with the function of quick action in large electric current. Stainless steel shrapnel can ensure the constant contact stress and remedy the intermittent overload in the event of a shock. frequent splicing and breaking. Easy to use: Regardless of plug or socket, inserting in the same color is a pair, easy and quick to splice and break.