This is an aluminum frame with an inside cavity where you can pour in silicone or epoxy to make your own molds. The frame has pins to keep the two halves aligned with each other. The rear panels of both halves are removeable.

Once the mold material is cured in the frame, it can be removed in order to use the frame to make additional mold inserts.

You can also use this frame to hold 3D printed molds. Click  HERE to get a 3D file of an insert for this frame.

Outside Dimensions: 4.0"W x 3.0"H x 1.5"D
Inside Cavity Dimensions: 3.0"W x 2.0"H x 1.0"D