What shelves fit my GR-6S?

Here are the shelves that will work with the GR-6S. 

1. GRW-SHELF1UNI - Gator Rackworks Shelf w/ Universal Hole Pattern to Accommodate Less than Rack Width Components; 25lb Weight Capacity; 1U - 9.4" Deep
2. GRW-SHELF1 - Gator Rackworks Utility Shelf; 10″ Deep; 1U