Dynaco USA offers the high-speed M2 freezer door. The door opens at a speed of 96 inches per second, and has a positive drive design with low profile 1/8-inch steel side guides with spring loaded UHMW inner guide, Dynaco says. It features automatic re-insertion, a soft curtain design and programmable high velocity/ volume air curtains. The maximum standard dimensions are 15 feet wide by 16 feet high.