BYB Weighted Desk Lamp Base for E430 Metal Architect Desk Lamp, Circular, 7.8", Silver Suitable For BYB E430 Professional Swing Arm Architect Desk Lamp Non-slip and non-scratch felt Weighted base to improve stability Irresistible Painted Matte Finish, Made of Heavy Duty Iron Diameter: 7.87 inch; Hole Diameter: 0.51 inch (13mm); Weight: 2.5kg This base turns your BYB E430 clip-on lamp into a table lamp, ideal for use on a table or flat surface. This base is weighted (5.5lb/2.5kg) to improve stability of BYB lamps; Painted matte finish to match the lamp; Features non-scratch/non-slip feet and measures 7.8in/20cm in diameter.