A 1 without suspension, welded diameter i=4mm
A 2 same diameter i=7,5mm
B 1 suspension, open, with rivet hole diameter i=4mm
B 2 same diameter i=7,5mm
C 1 without suspension, open, without rivet hole diameter i=4mm
C 2 same diameter i=7,5mm
D with suspension for chain-connected shutters
E with fixation for screwing
H with double-hook suspension Alu