LED40FR61B 4 inch 61 LED S-T-T with Black Plastic Flange. 40 Series 4" Round Sop/Turn/Tail Lamp with 61 LEDs. Has sixty-one 2-pin 5 mm round diodes for the fullest pattern. Fully potted circuit board or vibration and moisture resistance. Uses standard pigtails LT1406 or LT1410. Uses standard 4in. grommet LT40G or LT402G. Low amp draw .21 This light replaces Peterson M418R See pictures below for measurements.