Rite-Hite’s Universal™ GX-4000 Ventilation Screen panel is now available with an optional 30-inch high screen. The new 30-inch high Universal Ventilation panel allows more air to flow into a dock area and plant, while preventing bugs or pests from entering the facility without sacrificing security. The new panel can be retrofitted to most existing two- or three-inch sectional doors.Rite-Hite Aftermarket Corp., Milwaukee, WI.