BYB Weighted Desk Lamp Table Base for E476 and E433 Metal Architect Desk Lamp, Circular, 7.8", Black Suitable For BYB E476 and E433 Professional Architect Swing Adjustable Arm Desk Lamp Non-slip and non-scratch felt Weighted base to improve stability, no worry about overturn Irresistible Painted Matte Finish, Made of Heavy Duty Iron Diameter: 7.87 inch; Hole Diameter: 0.51 inch (13mm); Weight: 2.5kg