Made of laminated MDF (man-made wood product), the Shadowbox Frame by Nielsen Bainbridge has an inside working depth of 1 7/8", deep enough to frame 3-D objects easily. The frame has a matte black flat-top profile, regular glass and a drop-in back covered in black velour. They include pearlized lead-free pins to attach objects to the backing. Available in 4 sizes: 5x7, 8x10, 12x16 and 16x20.