Manufacturer: Molex
Part Number: 19070-0123
Type: Ring Terminal
Wire Gauge: 12-10 AWG (American Wire Gauge) - This means the terminal can accept wires ranging from 10 AWG (thicker) to 12 AWG (thinner).
Stud Size: #10 - This refers to the diameter of the hole where the ring terminal connects.
Material:
Tin-plated for corrosion resistance and better conductivity 
Vinyl insulated for insulation and protection 
You can crimp this terminal onto a 12-10 AWG wire and then connect it to a #10 stud for electrical connections. Molex specifies this terminal to be used with the InsulKrimp crimp process