Heavy duty cast brass. 7 stage chemically aged, weathered bronze (WB) brass finish. Finish will patina / tarnish depending on environmental conditions. Hi-temp ceramic socket w/ nickel contacts, stainless steel springs and Teflon jacketed wire leads. Clear heat-resistant lens. Brass knuckle screw. Included (GS1) ABS ground stake, ½” NPT tread slotted for easy wire installation. EPDM rubber bug plug with prewired 3’ 18/2 awg direct-bury landscape lighting wire. CETL listed and approved.