This umbrella is designed to resist potent gusts of wind. How? Thanks to its 9 resin-bolstered fiberglass ribs, which flex slightly to stay away from the dreaded “inside-out umbrella” effect on a blustery day. The Vertical Gage suggests the amount of pressure or bodyweight of a particular product or pressure. https://full-copper-ceiling-fan10752.csublogs.com/39889193/bourdon-pressure-gauge-an-overview