· Fit for pitched roof from 15 degree to 90 degree
· New style handle with ventilation gap and new locking system enable the window of good ventilation even without open the window sash
· The window sash can be stopped at any angle, so as to get better ventilation
· 160 degree turn over of the window sash, easy to clean the outer glass
· Latest design of the outer flashing gutter makes it joint with the flashing even close and gives it a better looking
· Easy to install all kinds of AHRD accessories