Easy to use Lockable Snap Posta Poster Frames are suitable for any wall type. Aluminium edges snaps back to quickly insert and change poster and sign contents as needed. Great for fast moving retail, hospitality and advertising boards. Available in standard A4, A3, A2, A1, A0 and custom sizes. Uses security key PFSKEY to release the frame. Non-lockable and outdoor versions also available Includes: polyester protector sheet Pet G Replacement Sheet Includes components:  Posta Frame Corner and Top Cap