From San Francisco Airport:

1. Take Highway 101 South toward San Jose.

2. Exit Highway 101 to Highway 92 east, and cross the Hayward-San Mateo Bridge.

3. After crossing the bridge, exit Highway 92 at Clawiter Ave .

4. After exiting Highway 92, turn left on to Clawiter Ave. at the stop sign .

5. Turn left on Diablo Ave.   (you will see the sign "Diablo Industrial Park").

6. You will find Four Dimensions a couple of buildings down on your left hand side. Look for the sign Four Dimensions.