... Wire, Bell Wire 1. Conductor: CCA, CU 2. Insulation: PVC 3. 2x0.5mm, 2x0.75mm, 2x1.0mm, 2x1.5mm etc. Flexible Twin Flat Wire, Bell ... air or underground.Flexible twin flat wire1. Range of ApplicationBuilding wire is fit for AC rated voltage 450V/750V and below ... (2x2.5mm²)O.D. 4.5x9.0mmFlexible 3 core flat wire Flexible Twin Flat Wire, Bell Wire