The Museo ALU Frame Stretcher System is lighter in weight than heavy duty wood stretcher bars yet more stable and warp free. They provide a crisp edge, true-to-square system that is truly revolutionary in construction. Crafted from durable aluminium, the Museo stretchers are edged with Norwegian spruce to provide a smooth, clean stretching bead, allowing ample room to back staple or nail your selected canvas or linen (with no edge ghosting). Cross bars can be added at any time without disassembly and a revolutionary 6 inch (15cm) Extender Bar allows for making virtually any stretcher bar size up to 150 inch, which combined with cross bracing, becomes completely dimensionally stable. Available in profile depths of 25mm and 45mm it offers great versatility for both framed and frameless artwork. Order your stretcher bars and bracing as normal along with a Stretcher Assembly Kit and or Brace Kit for quick assembly.