Outsunny Half Round Patio Umbrella Base for 3.8 cm or 4.8 cm Pole, Black
• Steel pole, with tightening knobs: A strong place to keep parasol umbrella in place. Knobs on garden umbrella base to fix so the pole doesn't move around. Suitable umbrella pole sizes: Φ 3.8 cm and Φ4.8 cm.