Pine stretched bars / FSC® certified-pine stretcher bars
Professional frame construction with kiln-dried,
beveled stretcher bars avoid to be touched by the brushes on painting
8pcs of wooden wedges to re-tighten the canvas
Stretched by hand for the best tension and tailored corners
Triple primed with acid-free acrylic gesso
Acrylic titanium primed for use with oil or acrylic painting
Balanced absorbency and tooth prevents sinking of oil colours
and improves adhesion

If the stretched canvas becomes loose, we can use the wooden wedges to re-tighten the canvas:
1) Remove the staples at the 4 corners on the back of the stetched canvas by screwdriver.
2) Insert the wedges into the 4 corners as attached picture.
3) Hammer the wedges lightly, enabling the bars extending outward, until the canvas are re-tight enough.