20x27x4 Revolution (6704-RSZ) by Avid Racing Concepts is a high quality steel/chrome bearing. Our bearings have been tested and proven by many racers. Check your manual for the correct size for your vehicle if you are not certain.
METRIC: 20mm (Inner) x 27mm (Outer) x 4mm (Width)
STANDARD: 0.7874" (Inner) x 1.06299" (Outer) x 0.15748" (Width)