Rectangular Tray Casting Housing & Master Model — STL for Silicone Molding

3D PRINTABLE STL FILE — DIGITAL DOWNLOAD Expand your handmade craft collection with this sleek and modern Rectangular Tray Master Model STL! This digital file features an all-in-one integrated housing/casing with a built-in pouring port. No need to build messy, leak-prone formwork out of tape, hot glue, or acrylic sheets—simply 3D print the entire master model, pour liquid silicone directly into the housing, and get a flawless, professional-grade silicone mold ready for production! Designed wit…

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