The 20x27x4 Rubber bearings 6704-2RS are a high quality steel/chrome bearing with rubber seals. These bearings have been tested and proven by many racers. Check your manual for the correct size for you 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)