Electric Bike Conversion Kit Professional KT 15A Controller LCD4 Panel TT009 Thumb Throttle Set for black.Feature: 1. Controller Shell Material: The controller shell of electric bike conversion kit is made of premium metal with groove design, excellent heat dissipation function to guard the internal circuit and avoid thermal overload. 2. Panel Material: Electric bicycle motor kit s panel is made of premium ABS material, lightweight, strong and durable, fine workmanship, high toughness and waterp