... Specification: Inner diameter:108mm, Thickness:38mm or 35mm, Bolt:12*1.5 /12*1.25 . Material: Wheel Spacers for car 6-139.7 ... Specification: Inner diameter: 108mm, Thickness:38mm or 35mm, Bolt:12*1.5 /12 ... *1.25 . Material:Alloy Aluminum Reliable quality from our OEM manufacturer ...