SGR-EV is a galvanized steel pipe threaded ring made of rolled mild steel with a zinc-nickel alloy. This counter ring is used for the galvanized steel pipe Staro Gewinde-ES-V in conjunction with the SM-EV connecting sleeve. This product is suitable for laying cables with functional integrity (E30/ E60/ E90) and has been tested in the system.0605 DIN EN 61386-21