This Height Extender from ITI is designed to work in tandem with the Low Profile Control Arm Skate. The precision-fit Height Extender provides additional ground clearance when maneuvering certain vehicles, including high-end vehicles with low front valances. Nested together, the two combine for an overall height of 5-1/2". The Height Extender is made from a unique recycled material which provides the most durable and longest lasting performance versus competitive products. ITI skates are manufactured in the USA.