Bellawood Prefinished Natural Strand Bamboo 5/8 in. Thick x 7.5 in. Wide x 48 in. Length Retrofit Riser, $34.99 USD/Box, LL Flooring (Lumber Liquidators)

48-inch Natural Strand Bamboo Riser fits the step face of a stair riser, harmonizing with the adjacent stair tread or hardwood floor for a unified look. Matching aesthetics enhance the space with natural bamboo texture.