Rio Grande Double Unvented Aluminum Mold Frame
This frame holds two molds at the same time. Rio Grande mold frames are made from solid aluminum bar stock that won’t warp after repeated heating and cooling. The unvented frames are specifically designed to work with silicone rubber. Pre-drilled frame ends hold the sprue rod and formers perfectly centered during vulcanization so your model stays centered, ensuring a precision line-up with wax injector nozzles. The frames accommodate 1/8" sprue rods.