Pebeo Arty's Easy Fix Stretcher Frame for Silk Painting, 37 by 37-Inch An innovation allowing easy stretching and painting of silk and other fabrics Rigid and stable EASY-FIX frames are washable and easily transportable Durable plastic, Completely washable, Easily transportable Can be adjusted to sizes up to 37x37 inches Can be extended to larger sizes using the ASF 4 Extension Kit An innovation allowing easy stretching and painting of silk and other fabrics rigid and stable easy-fix frames are washable and easily transportable Durable plastic, completely washable, easily transportable Can be adjusted to sizes up to 37x37-Inch can be extended to larger sizes using the asf 4 extension kit