Fixing material B 13.1
with square 7 / Including opposite bottom plates. The B 13.1 version is available with top or bottom operation. (Illustration: lockable from above)

Fixing material B 13.2
with square 8 / Including opposite bottom sliding brackets (also for heavy duty gratings) This version is available in galvanized steel and stainless steel.

Fixing material B 13.3
with square 8 / Can be screwed to the Gratings for retrofitting. Suitable for gratings with a pitch of 33.33 mm and grating heights of 25, 30 and 40 mm.