Set of 4. The ValveStem Signpost won the Best New Product Award at the SEMA Show in the Wheel and Related Category. This product threads directly onto the valve stem for a secure and reliable mounting point that then utilizes popular ball/socket sign clips. Clips are 8cm, and a pair of 5cm extensions are included in each set. Add your own sign and you'll have a professional looking way to show price and product information.