564/568/570 Series Circuit Board Indicators Dialight 564/568/570 Series Tri/Quad-level Circuit Board Indicators (CBI®) offer 2mm and 3mm, three and four diode LED indicators in several color combinations. The 564 Series includes 3mm LEDs in three-LED combinations of 3x green, red/green, and red/yellow/green. The 568 Series includes 3mm LEDs in four-LED combinations of 4x green and red/green. Multiple CBIs form horizontal LED arrays on 1.91mm center-lines. The 570 Series includes 2mm LEDs in three-LED combinations of 3x green and red/yellow/green. All of the Dialight 564/568/570 Series Tri/Quad-level Circuit Board Indicators come in high contrast, UL 94 V-0 rated, black housing, and housing stand-offs facilitate PCB cleaning.