Galvanized track for hanging curtains, balancers, hand tools, electrical cables etc. Simpler variant of track. Has more attachment points than the aluminum rail.
Clarifying illustration:
A: 81072209 Running rail galvanized
B: 81071508 Running rail bent
C: 81070203 Wall bracket
D: 81070104 Ceiling bracket
E: 81070906 Joint piece
F: 81070955 Joint T-model
M: 81071201 End stop for runner
N: 920163 Runner 1-axis
O: 920167 Runner 2-axis
P: 81071003 S-hook
Q: 81071706 Pull cord with ball
R: 81071805 Suspension strap