5Pcs 20mm Black PCB Plate Ultra Bright White 3 Watt 3.7V LED SMD Chip. WHITE Color 3W SMD Chip. 3V to 3.7V Metal Plate Heat Sink Aluminum Base 20mm PCB DIY LED Light Bulbs. 5mm on 20mm Heatsink Board SMD. Torch Light LED SMD. 3W High Power White SMD.