Review on TPMS Sensor Replacement Service Kit - Universal Fit Tire Valve Stem Caps, Air Covers for Car, SUV, Truck, Motorcycle, Bike, Bicycle - Original Plastic Black (Pack of 20) by Zha Rivera

I read someone claiming they are cheap Chinese knockoffs. I compared them to the two on my Mercedes and they are exactly the same. Except for the red ring inside! See fig. The new set is shown above. Very little difference, inner diameter in the middle of the ring is smaller. The rest is perfect!