Heavy Duty Canvas Stretcher Bar Cross Braces. Specifically designed for frames 48 inches and above, these cross braces are essential for maintaining the integrity of your artwork, preventing warping and bowing caused by the tension of stretched canvas. Crafted from the finest European re-forested timber, these bars are made from kiln-dried, knot-free pine, ensuring long-lasting durability.Ideal for canvases up to 84" x 84", each set includes both brace types B and C, extending in two directions for complete support. A cross brace is required for any stretcher bar over 40 inches to provide added strength. Always brace using the shortest length to maintain the frame's stability. For example, a 20" x 40" stretcher requires a single 20" brace. These braces are designed to fit seamlessly with our new heavy-duty stretcher bars, ensuring your artwork remains taut and secure, no matter the size. Perfect for professional artists looking for long-lasting, reliable canvas support for large-scale projects.