C9 Light String, 100 feet, 100 sockets, SPT2, end-to-end, intermediate base (E17)

C7 and C9 light strings are popular for stringing Christmas lights around homes, office buildings and shopping malls
18AWG wire, includes heavy-duty sockets and molded no-fuse male plug, spacing of 12 inch spacing between sockets
SPT-2, maximum run of 9 Amps (limit of 1,100 Watts)
End-to-end connectable (includes female plug) - note that for incandescent 7 Watt C9 light bulbs, your maximum run is limited to 157 feet (1,100 divided by 7).
Only connect end-to-end if you use LED C9 light bulbs, which consume much less power than 7 Watts