Mirror polished 304 stainless steel, 3D L-shaped three-way structure with two horizontal channels and one vertical downward channel, rounded square transition edges. Used for three-dimensional corner connection of double-layer handrails and horizontal branches of posts, realizing integrated linking of horizontal handrails and vertical support tubes. Neat three-dimensional lines improve overall texture of railings, thickened tube wall resists corrosion, commonly adopted for villa and commercial project railings.