It is always very topical Persian per day produced by Baldelli , with a fixed open slat structure of 56x11 mm .
The Persian per day provides optimum air exchange and solid protection from the elements .
Other important technical features are: the main frame of 85x56 mm thick .; the support hardware to the wall and the closure with shutter stop movable arms .
The Persian per day is available in a wide variety of woods: pine , Okoume , Niangon and Douglas .
The finishes , however , may be natural, walnut or etched enam