The pivot jamb ensures smooth operation makes out-of-square adjustments easy. The unit can be installed for left or right entry and swings out only. The bottom threshold width is 1. 81 inches wide and designed to repel water in the shower. The overall unit height is 63. 5-in tall. This door can be applied to fiberglass or tile shower bases. Shower door only - does not include shower walls or base. 0. 188-In thick clear glass provides the polished look to showcase your shower. Walk-through width is approximately 20. 94-in wide.