this is a PRO-RC product:
Package includes Qty. 5 - .5mm wheel hex spacers designed to fit in the rim or on the hex
designed to widen the wheelbase an additional .5mm on each side.
Great product to run when you are close to legal width and worried a tire change or toe adjust can make the car to wide.
EASY TO CHANGE IN TECH BEFORE A RACE
Being a VERY thin perfomance part there will be no warranty once this product is installed on the vehicle