Baseboard Diffuser Diffuser is designed to cover the entire duct opening near the baseboard. The angle directs air flow to the optimal areas in the room. Available in Unfinished Cherry, Maple, White Oak or Red Oak Sizes in 15”,18”. Each products packed in heat shrunk bag then 20pcs to one master carton. We also supply wooden grid grills, wooden filter grills, block wooden grills, wooden wall return, floor registers, egg crate floor registers, Single Deflection Floor Register