Double Face: Red Stop/Tail/Turn - Amber Marker/Turn This combination signal light requires a 1/2\" hole for stud mounting. All mounting hardware included. For easy installation the lights feature prewired supply wires and are self-grounding. Red or amber snap-on acrylic lens and black acrylic cover. Meets FMVSS/CMVSS 108 requirements and meets ASABE 4 Candle Power to the side amber light requirements. 4.28\" dia. x 2.16\"