... T6 billet aluminum 2)Process:Precision forged+CNC machined 1)This type of adapter is used for 5 lug 5.5 ... " To 5 Lug 5.5" (Pair) . 2)CNC machined billet ... aluminum and thickness options are 1", 1.25", 1.5" ,2",2.25",2.5",3"3)These adapters ... 2011 Our premium quality adapters ensures durability and strength. Wheel Adapter 5 Lug 5.5" To 5 Lug 5.5" ...