The TE Connectivity 2-1318118-9 is a 20-position, 2-row receptacle housing from the Dynamic D-2100 series, on a 2.50mm pitch with a 3.75mm row spacing. It's a free-hanging (in-line) crimp housing — you load your own female socket contacts into it, then mate it with the corresponding Dynamic D-2100 plug header. The latch lock snaps home to hold the pair together in a harness, and the polarizing key stops you from plugging it into the wrong position in a multi-connector assembly.
Contacts — You Order Them Separately
You need to buy the matching Dynamic D-2100 female crimp socket terminals separately and terminate them onto your wire before loading into the cavities. The crimp termination is standard for the series; pick the right wire gauge and terminal plating (tin or gold) for your current and cycle-life needs. No contacts in the bag means one more line item on the BOM, so factor that in when you're pricing out the assembly.
The mating plug for this 2-1318118-9 receptacle is a Dynamic D-2100 series plug header with the same 2.50mm pitch and 2-row layout — latch lock on the plug side engages with the receptacle's lock. If you're building a harness with multiple D-2100 connectors in the same bundle, the keying keeps each circuit going to the right place.