1, Aluminum coil for channel letter. 2, No need extra trim cap covering. ... 4, Low price Aluminum coils, aluminum strips, aluminum trim cap for channel letters.1, Special triangle or flat bloak design channel ... design are processed by mould.Specifications:1). 6 Meters per Strip, 150m per Coil2). Height: 60mm, 83mm, 85mm,100mm,108mm3). ... White, Black and Red. aluminum coil or trim cap for channel letter