These expandable pine stretchers are 31mm deep and supplied in pairs (cross bars are in singles). They have a raised lip to allow adequate clearance between the stretcher and the canvas surface.
Stretchers 90cm or larger have a morticed slot in the middle to allow the fitting of a crossbar.
To make a 40 x 80cm canvas, you will need to order 1 pair of 40cm stretchers and one pair of 80cm
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