The Pilot M4-3 Mini Door is the perfect door for any storage facility! With the highest quality tension system in the industry and a two-point bearing assembly, the M4-3 allows for smooth operation over and over again. Pilot has developed and improved this door over the last two years and is very excited to release it. With the newest drum and bearing technology, the door needs less tension to operate than ever meaning longer life cycles and less maintenance! The door is perfect for any size door on multilevel and single story facilities.