Key switch, button (changeover), 1-pole, AX 250 V ~, IP 44, WG 800 locking plate integrated for profile half cylinders with approx. 40 mm total length (DIN 18252), e.g. item no.: 28, 28 G1 with label field 9 x 50 mm with screw terminals for rigid and flexible conductors up to 2.5 mm2 connection terminals in accordance with DIN VDE 0632 (EN 60669) When using other locking cylinders, make sure that they only have an opening for keys on one side (otherwise no protection class IP 44)!