Stairtek Unfinished Red Oak Solid Hardwood 3/4 in thick x 7.25 in wide x 36 in Length Riser, $24.99 USD/Box, LL Flooring (Lumber Liquidators)

Attach this 36" Red Oak Riser to the stair step face, matching lower stair treads or hardwood flooring beautifully. It's made from solid hardwood, measures 3/4" thick and 7-1/2" wide, providing a seamless look to your staircase.