This is a Rubber Shorty TPMS Valve. This valve is less than 1" tall (24.0 mm) sticking out of the wheel. This is the short version of the 20018 valve. This valve helps with clearance issues, large calipers, control arm ect. Anything that a stander size valve would be in the way.
NOTE: TPMS Valve Stem base is not threaded. Each valve comes with a self-tapping screw.