1. The diameter of the drain plug is 5.5 inches (140 mm), and the drain diameter of the sink is 4.5 - 4.7 inches (114 - 120 mm); 2. The diameter of the drain plug is 4.3 - 4.4 inches (110 - 114 mm), and the drain diameter of the sink is compatible with φ3.5 inches (89 inches (9 - 9 inches (9 mm).