Constructed from 26ga by 24 in wide sheets of steel roll formed with integral grooves that are hemmed together to form a continuous sheet guided vertically by roll formed guides. Sheet coils around a spring loaded shaft above the header as the door is opened. Designed with ease of installation in mind.

160C Heavy Duty 12″ Coil  
157C Medium Duty 12″ Coil
150C Light Duty 9″ Coil