The MCL20RHCHB LED Marker/Clearance Lights from Optronics International is a three-diode, PC-rated, red oval marker/clearance lamp with a grommet that fits a 3/4" cut-out. It measures 1.875 in. wide, 1.5 in. tall, and 0.5 in. thick. Able to be used as a combination side marker and front or rear clearance light when mounted at an angle, the lamp's lens is made of polycarbonate material and sonically welded to resist dust and moisture. With a surface-mount device that protects the lamp from moisture, shock, and vibration, the MCL20RHCHB also comes with a one-diode lifetime warranty.