H.V. Test : 2 KV for 1 min, Insulation Resistance : 100 M , Pitch : BT-10(9.5mm), BT-30(11mm), Body : BT-10 Nylon-6 (BT-10 Bakelite), Conductors : Brass Nickel PlatedScrew : Pan Binder Head Duly Nickle PlatedTerminals : Brass Duly Tin Plated, Type approved by CACT, LCSO.