3mm LED Panel Clip The Kingbright RTC-31 is a one-part clip suitable for mounting Kingbright 3mm LEDs in panels of up to 3mm. Rapid Electronics are Kingbrightäó»s leading UK distributor of LEDs, to find out more about the full range of Kingbright products please visit Rapidäó»s Kingbright page Fits hole diameter of 4.4mm Panel thickness up to 3mm For use with LED lamps