... 550mm(6 blades),640(7 blades). packing:carton Louvre, glass aluminium louvre, aluminium louvreThe glass louvre is applied to the garden greenhouse. Specific size: ... non-notch frames,made of sheet glass or float glass as per your requests.2 Glass louvers can be cleaned conveniently3 Was ... the same angle. The major parts are louver frames,glass blades and inner installation instruments.6. The angles of ...