for switch with indicator light ref.-no.: 502 KOU, 503 KOU, 506 KOU, 501-20 KOU, 502-20 KOU, 506-20 KOU
for push-button ref.-no.: 531 U, 533 U, 533-2 U, 534 U
Metal versions (anodized aluminium)
Spare part:
holder plate ref.-no.: CD 90 HP
for metal versions ref.-no.: CD 90 MHP