Gravely has expanded its Pro-Turn 400 series commercial lineup with the introduction of a new diesel zero-turn mower. The linef eatures a 25hp Kubota engine to deliver superior performance and efficiency and is available in a 60- and 72-inch deck. It also features an air-suspension seat with added seat isolation, and the air pressure can be adjusted with the touch of a button. The unit also includes standard foldable ROPs, designated front and rear tie-down points, double-sided anti-scalp brackets and heavy-duty side-discharge chute.