A nice touch is that the Deltrol brand sits right on top, making it easy to spot.
112 PCS 2.54mm Male Female Pin Connector Assortment Kit PCB Arduino Shield
This 2 pack of relays is great for anyone who likes to keep a few backups around.
A nice touch is the smooth edges, so the enclosed relay does not scratch nearby parts.
When I compared, you will find that the model 1-1618002-8 is the one described here.