For use with liquid mold rubber. Consists of a solid aluminum U-frame with built-in sprue former, two pieces of heavy-duty clear plastic and industrial bands.

Made extra-tall to allow expansion of liquid rubber during vacuuming — no spills. Available in 4 thicknesses: 3/4″, 1″, 1-1/4″ and 1-1/2″. All sizes make molds up to 1-7/8″ wide x 6″ high.

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