Framatic Fineline White Metal Frame 16"x20" with 11"x14" Mat Opening: The thin profile frame features a 1/8" white aluminum moulding and Framatic's patented "Framlok" corner joining system, which enables one end of the frame to be easily removed for loading yet securely attached when in use. Spring clips adjust the depth of the frame to accommodate up to 3/8" of matting and artwork. This frame comes with a glass front and a double white acid free shadow mat with a white core.