The LH1173 is a GX16d dcramic socket. It is rated for 1500 watts and 600 volts and is pulse rated at 5KV. The LH1173 is made of ceramic for long life and heat resistance. It is used for Par56 mogul end prong lamps. The leads are 10 inches long 14awg silicon rubber coated for heat resistance. The LH1173 measures 2.44 x 1.30 x 1.10