el flash wire 1. many colors are available 2.200-500M/Roll,the length can be ... radiation does not exist. Cold light source, fine, uniform, bright colors, colorful, suitable for day and night observation. With excellent characteristics ... .3mm, 2.3mm, 3.2mm, 4.3mm, 5.0mm,. Available Colors: Red, Yellow, Blue, Fluorescent green, Orange, Purple, Pink, Blue-Green ...