Eaton Cooper Wiring Devices 2609BK-BU Nonpolarized, "Add-a-Tap",10A In-line outlet For Use with SPT-1, Black.
IMPORTANT NOTE: USE ONLY FLAT #18-2 SPT-1 CORD
Do NOT use on electric shaver cord (TPT) or on any device rated over 1250 watts (10 amps and 125 volts). Use ONLY with 2-wire non-polarized plug (typically Eaton 2601).