Perforated Roller Shutter, rolling door Slat:SLLP-32-55 Color:white,cream,gray Material:6063T5 aluminum Electric Roller ... door, commercial door . Roller shutter Perfomance:1) Slat option: 32, 37, 40, 55,60,77,78,100,120mm;hurricane slat 55, 56mm ... ,120mm2) Rail option: 54, 55mm, 68 mm ,76mm,120mm proof-hurricane ...