Amazon.com: 1.5'' Inch Heavy Duty Stretcher Bars 48'' 2 Pack. Wood Painting Extra Deep Stretching Bars. Wood Canvas Stretcher Frame. by WholesaleArtsFrames-com (SB48-1.5)
How to Use the Canvas Wedges That Come with a Canvas or Stretcher Bars - Jackson's Art Blog
Stretcher bar - Wikipedia
3/4" Deep Stretcher Bars
18mm Canvas Stretcher Bars Professional Standard Canvas Frame - Sold in Pairs | eBay