Ideal shade coverage: upto 54" tables Fiberglass ribs bend and flex in windy directions Our most popular commercial umbrella. FAQ: What is the ideal shade coverage? The optimal shade coverage is up to 54" tables. What is the benefit of the fiberglass ribs? The fiberglass ribs will bend and flex in breezy conditions making the 735 more durable for commercial use. What is a "seamless" threaded coupling? The coupling is concealed inside of the pole so there is no exterior hardware showing. What makes the 735 a commercial umbrella? A manual lift, non tilt umbrellas has no moving parts and is safe for children in commercial environments. What is the advantage of the solid resin hub? The solid resin hub will not crack or shatter if the umbrella strikes the ground.. Base not included Base not included.