AMERIGLO suppressor height sets provide an elevated sight picture able to co-witness with slide-mounted miniature red dot optics and suppressors. For more information on how to choose the correct height set for your suppressor or optic visit the AMERIGLO website under the "INFO" tab. Features: Green tritium, 0.14 inches with white outline front Flat black 0.15 inches square notch rear Fits all Glocks except 42/43