... beech wood The moisture: under7-12% Fir wood stretcher bars We have our stretcher bar factory. We can supply fir wood and ... 18x40mm, 38×38mm, 38×64mm, 25×35mm ,20x25mm, 30x36mm, Our stretcher bars are designed for easy assembly, we only use wooden ... .52.5InclinePine /fir/beech Gallery wrap stretcher bars15201.52LinePine /fir/beech Economy design stretcher bars 36303.63InclinePine /fir/beech Gallery ...