THIS IS A ITEM I ALWAYS USE ON MY CAR
NEVER HAVE TO WORRY ABOUT FAILING TECH AND DONT HAVE TO BYE LARGER 17MM HEX.
-- NOW MADE IN COLOR TO MAKE MORE VISIBLE --
this is a C3-RC:
Package includes Qty. 10  - 1mm wheel hex spacers designed to fit in the rim or on the hex
designed to widen the wheelbase an additional 1mm 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