uxcell Star Shaped LED Light Bulb Aluminum Base Heatsink Plate 1W 3W 5W 20mm Dia 20 Pcs Material : Aluminum;Color : Silver Tone, Black;Size : 20 x 1.5mm / 0.8" x 0.06"(D*T);Power Fit : 1W 3W 5W One package including 20pcs LED aluminum heatsink plates. 20mm Star LED Light Bulb Aluminum Base Heatsink Plate 1W 3W 5W. Protect your LED lamps tube damage from high heat. A great choice for you, it will be a good partner for LED lights tube.