The housing is natural-colour PA66 (Nylon 6/6) rated for -30°C to 105°C operation, with a latch holder that locks the plug and receptacle together against vibration.
This receptacle mates with the Signal Double Lock plug housing — the plug uses female socket contacts, while this receptacle accepts tab contacts. The housing does not specify a wire gauge range; that is determined by the crimp terminal you select. Choose the correct tab terminal for your wire size and crimp it before inserting into the housing.
It is a more compact alternative to the 6-position 1-1376477-6 plug housing in the same series, which uses a latch lock instead of a latch holder.