LED452R Rectangle Red Stop-Tail-Turn 21 LEDs. Has twenty-one 4-pin diodes. Fully potted circuit board for vibration and moisture resistance. Uses standard pigtails LT1406 or LT1410. Uses standard square grommet LT45G.Low amp draw .21 DOT SAE IP 2ST 97 This light replaces Maxima M42200R , TruckLite 4525R ,See pictures below for measurements.