We sell these in packs online or they are available individually in store. Winsor & Newton’s new & innovative Professional Cotton Canvas range caters of the needs of those with the very highest quality demands. These canvases feature the unique new pro-stretcher device for ultimate control over the surface tension. These canvases are hand stretched & have a 16.9oz/480gsm weight. The 21mm depth profile stretcher bars are produced from warp resistant kiln-dried, FSC approved, heavy-duty pine. Each Canvas is prepared, & ready to paint, with highly pigmented titanium dioxide primer for superior coverage & performance. Each canvas is also archival & acid free. For use with all forms of acrylic, oil & other mixed media applications. Available in a wide range of sizes in both metric & imperial. Whats the difference between the Professional & the Classic Winsor & Newton Canvas range? Professional Range Classic Range Pro-stretcher™ tool Wooden keys for stretching (Pro-stretcher™ tool not included) Pine wood frames Spruce Fir & Paulownia wood frames Available in Cotton, Cotton Deep Edge & Cotton Fine Detail Available in Cotton, Cotton Deep Edge & Linen Heavier canvas cloth weight Lighter canvas weight Winsor & Newton Professional Canvas Options Range Cloth Wood Depth Weight Cotton Cotton Pine 21mm 480gsm Cotton Fine Detail Cotton Pine 21mm 280gsm Cotton Deep Edge Cotton Pine 42mm 480gsm How to use the pro stretcher tool Insert the tool into each corner of the canvas With a screwdriver, tighten the device by following the direction of the arrows. Tighten the device in each evenly in the opposite corners until you’re happy with the surface tension. With each professional canvas you’ll also receive a label to apply to the back of the canvas to help easily identify your work. Compare the Artist Canvas Range