Grace 2-Arm Floor Lamp with Marquina Marble Base

An exercise in essential geometric lines, this floor lamp embodies the concept of elegance and minimalism at the same time, infusing a room with modern sophistication. It combines refined materials in its sleek silhouette: a circular base (Ø 18 cm) made of black Marquina marble sustains highly resistant steel stem and arm enriched with hand-brushed brass details and holding a mouth-blown smoky glass spherical shade (Ø 14 cm). The piece includes a black fabric electric cord with VLM Castiglioni switch and a G9 lightbulb of max 33W. Please identify the type of socket required.