This is a precision-engineered connector designed for custom, standard hollow stainless steel tube frameworks. The model is a 3D-printed, three-way corner joint with a single vertical support. It serves as a secure, rigid intersection point, allowing for the stable connection of up to four 10mm (or user-scaled) stainless steel tubes—three in a horizontal plane and one vertical leg. Each aperture is a standard circular socket with a defined depth and a central through-bore, ensuring a snug fit and preventing tubes from pushing through completely, maintaining precise frame dimensions. The central vertical pillar adds structural rigidity. The model is optimized for FDM 3D printing with fine layer lines, making it easy to produce as a component for rapidly prototyping or constructing architectural models, furniture frames, shelving, or display stands. It is a fundamental building block for modular stainless steel tube construction.