Ecoolbuy 50 Pairs Female/Male Spade Insulated Electrical Crimp Terminal Connectors Apply Vinyl, PVC and nylon material for the insulation sleeve, working ultimate temperature is 75  and 105 respectively Insulation sheath enclosing copper ring is double pressure type end and connectors, which can maintain reliable performance under vibration severe environment Connector material: Copper Size(L*W): 2.2*0.8cm(female), 2.1*0.6cm(male) Color: Blue