This is a single piece of acrylic surround frame for making molds. The internal measures 165mm. It is approximately 10mm thick acrylic, giving plenty of depth for creating your molds.
***Please note - The image includes liquid silicone and mold making blanks for display purposes only. This listing is just for the clear acrylic mold making frame. Your piece will be supplied with a protective paper/plastic film, which can be removed by simply peeling off.