GMT, a Rhode Island-based composites specialist, recently delivered two highly customized showers to MAV Aircraft Services for installation in an executive Boeing 767 being done by the Fort Worth-based interiors specialist. Both composite enclosures measure 40 inches in diameter, 80 inches tall and feature curved, transparent Lexan doors and a slightly raised floor that allows water to run off around the edge and into a hidden drain. Made of aramid honeycomb-core fiberglass and flame-retardant epoxy, each complete unit weighs 160 pounds. Bristol-based GMT, primarily a composites provider for the yachting industry, has built 20 aircraft showers for business jets ranging from a Gulfstream to a Boeing 747.