Hercules doors from Metecno-Aluma Shield feature heavy-duty hardware and tracks coated for corrosion resistance, double “J” door tracks with 4-wheel adjustable trolleys, perimeter neoprene seals and non-electric instant reversing safety edges. All of the door’s electronic components are factory assembled and pre-wired for fast, simple installation. With a standard pre-painted, white stucco finish, the doors are available in thicknesses from 2-in. (R-16) to 6-in. (R-50).