Built tough with power, security, and durability in mind, Model 888 ADV-Xtreme is ideal for applications where security and performance are a priority. This high speed metal door is constructed with dual-walled aluminum that can withstand pressure up to 100 psf*. Model 888 ADV-Xtreme also features a patented helical-designed steel head plate that helps prevent metal curtain contact and provides smooth operation. A patented curtain monitoring device ensures the door has a redundant system to monitor the position of the door. High speed metal doors are designed for quick installation and provide easy access to maintain.