uxcell Metal Nut LED Mounting Holder Panel w 3mm 50 Pieces Black Product Name : LED Holder;Fit LED Diameter : 3mm Thread Diameter : 5.5 mm / 0.22";Total Length : 11.8 mm / 0.46" Material : Plastic,Metal;Color : Black Net Weight : 35g Safety locking screw in base for secure fitting; Durable, heatless and long-lasting