The Original Stephen Sawyer Canvas Bridge Easel Accessory Secures & Supports Stretched Canvas, Allows Artist's to Paint Edge to Edge, Eliminates Sagging- Size 24 Inch (Pair) Improve canvas stability, eliminates canvas sag, removes force from center of canvas, flexes to place even pressure on canvas corners Crafted from sturdy and durable beech wood, features points to firmly cradle the canvas A patented accessory that fits almost all easels. Use with linen, cotton, primed or unprimed canvas Use with canvases and panels up to 60" Contains 1 pair (top/ bottom support)