WA-SLED LED Spacers Würth Elektronik WA-SLED LED Spacers are tubular metric spacers for 3mm and 5mm LEDs and made of a black nylon 66 material. The WA-SLED metric spacers offer a temperature resistance from -30°C up to +85°C and feature a UL 94V-2 flammability rating. Würth Elektronik WA-SLED LED Spacers are ideally suited for sockets for 5mm LEDs with a panel thickness of 1.1mm and 7.1mm to 7.33mm drilling.