Fir Stair Tread – FIRTREAD Call For Quote $17.76 Interior/Exterior stair tread 1″ x 11-1/4″ View Product Catalog Fir Stair Tread - FIRTREAD quantity Add to list Want a discount? Become a member. SKU: FIRTREAD Category: Stair Parts Tags: bullnose tread, tread Description Description Fir tread, solid vertical grain, for interior or exterior stair systems. FIRTREAD – 1″ thick x 11-1/4″ from nose to back. Sold by the foot in random lengths. Made in USA