When a 2 1/2" opening that is available on our standard J Rack just isn't wide enough for you then these racks are just the thing with their 5 1/4" opening. Not only are they wider, but they are made from 3/16" acrylic for more heavy duty needs. All of these racks have a 1 1/4" front lip and a 6 1/2" high back. Because of their unique shape, shipping costs for these items are fixed. However some items may be re-quoted if the calculated freight cost is too high or too low. We will review your order before shipping and contact you if adjustments are necessary.