Rubbermaid 1-Step 300-lb Capacity Black Plastic Step Stool in the Step Stools department at Lowes.com
Amazon.com: McKesson Step Stool for Exam Rooms, Steel, Black, 8 3/4 in x 11 1/4 in x 14 1/4 in, 350 lbs Weight Capacity, 1 Count : Industrial & Scientific