Phoenix QuickTrim Stainless Steel Rear Hub Cover Kit for Medium Trucks. HubCover is 6.25″ in Diameter with 2.88″ Hex Bolt Center Mount. This Fits MediumDuty Trucks with 8 Lug Steel or Aluminum Wheels. Available in three styles for use with all brands of aluminum wheels: open, smooth, or emblem Made from rugged stainless steel and polished to a mirror bright finish Installation is quick and easy and does not require lugnut removal unless noted