C50 Aluminum Venetian Blind is a great product for internal or external.This slat is C-shape curved, which could reduce the final height when the slats packed up.

Slat has normal and perforated, the perforated slat with many small holes leading to some certain outside viewing when the blind closed.

C50 system often uses side cord, which is very simple and reliable to make the blind stable.

C50 can be motored in the room, whatever the manual or motor control was applied.