... : 400*500mm,1830*2440mm etc. Two-way mirrorIntroductionA two-way mirror (also, one-way mirror or one-way glass) is a mirror which is ... double door vestibule. These observation rooms have been used in:Surveillance for a Shops, Showrooms, Warehouse, Office, Daycare, or Bank. ... based on customers needsPacking:1.Inner packing:PP bag for one piece2.Outer packing:carton for 5 pieces two-way mirror glass