21010000030 CONN. MICRO JACK ACCES.CAP (COVER), PROTECTIVE M12 21010000030 is a premium microphone jack accessory that featuring a CAP (Cover), Protective type made of Metal material. Designed in M12 shell size, available in nan color. Manufactured by HARTING in the M12 series. Compliant with ROHS standards and available in BULK packaging. Perfect for enhancing connectivity and durability in professional audio systems.