Icon Alloys Compression Double Black 6-Lug Wheel; 18x9; 25mm Offset - This wheel's elegant design will certainly enhance your vehicle's aesthetic, complementing its luxury and performance. The unique styling of this wheel makes it an ideal choice for a standout quality of your ride, reflecting the premium quality associated with the Icon Alloys brand. The 18x9 Icon Alloys Compression Double Black 6-Lug Wheel underwent a thorough finishing process that protects your wheel from driving hazards, while looking great in the process. One-Piece Cast Aluminum Construction. This wheel is manufactured using gravity casting. Gravity casting is the process of pouring a molten aluminum alloy into a wheel mold or form utilizing the earth's own gravity to help fill the mold. The result is a strong, durable wheel that has the same good looks as a more expensive wheel, at a fraction of the price. Application.