Specification for lens: Diameter: 45mm Height: 19mm Angle: 60-80 degrees Focal length: 30mm Material: high quality glasses Application: focus light, make the light looks much brighter Fit the 20W-30W high power LED we are selling on eBay/SMT or like LED. Specification for base: Material: aluminum alloy Compatible for 20W-30W spot lights, automobile lights, projector lamps Specification for heatsink and fan: Voltage: 12V DC Heatsink fan dimension: 80*80*25mm Aluminum heatsink dimension: 76*80*40mm Description: 1) Butterfly-shaped design for larger heat dissipation area, improve the overall thermal performance, also the style is unique and nice 2) fFan with de-vibration cover, both heat and silent 3) Heat pipes with HDT technology, powerful performance to meet the elite enthusiasts 4) Fin hinged design on both sides prevents air leak effectively, and heat more evenly 5) Multi-compatible clip Application: cooling, avoid LED overheat fit high power LED 20W-30W Kind notice: there are two groups of black wires and red wires. One black wire represents 12V- and one red wire represents 12V+. The other blue wire have no use.