Ledil Hekla Sockets LEDiL Hekla Sockets are made up of long-lasting material and Polybutylene Terephthalate (PBT) which can handle high temperatures without losing grip. The low profile and robust design ensure that the constant pressure between the Chip On Boards (COBs) and the heatsink is maintained. The Hekla sockets support a wide range of different COBs from different LED manufacturers and provide good compatibility with LEDiL optics.Learn more