The Toro 1090343 is a genuine OEM high lift mower blade designed for 42-inch cutting decks on various Toro TimeCutter zero-turn mowers. This durable blade measures 520.7 mm (20.5 inches) in length, 63.5 mm (2.5 inches) in width, and 3.81 mm (0.15 inches) in thickness. It features a 15.875 mm (5/8 inch) center hole and two 9.525 mm (3/8 inch) outer holes spaced 63.5 mm (2.5 inches) apart center-to-center. Engineered for optimal grass lift and a clean cut, it's a direct replacement for part 109-0343-03.