Stairtek Unfinished Modern Square Nose Red Oak 5/8 in. T x 11.5 in. W x 48 in. L Retrofit Stair Tread, $49.99 USD/Box, LL Flooring (Lumber Liquidators)

The Stairtek Modern Square Nose Red Oak Stair Tread measures 5/8 in. thick, 11.5 in. wide, and 48 in. long, providing a classic update to your stairs. Available for $49.99 per box from LL Flooring.