BEST Heavy Duty Pine Stretcher Bars are Made in the USA, by Wisconsin Craftsmen, and are available from 20cm to 370cm .BEST Bars are made of fingerjointed wood to provide for greater strength and straightness of your bars.Our beefy 2.5cm - 1.3cm by 5.1cm profile supports very large works and allows for gallery wrapping of your canvas.We recommend cross bracing any dimension over 90cm .Cross bracing prevents bowing of the wood and helps keep your artwork square and flat over time.We recommend our BEST Key System be installed on all stretched canvas to enable easy tightening of your canvas should wrinkles appear in the future.Jack Richeson Hardboard Corners also offer a professional look to your work making sure you canvas corners stay square and true.Jack Richeson's BEST Stretcher Bars represent the highest quality available, and one of the last American producers.Your artwork deserves to say "Made in China".BEST Bars, Made in America by Wisconsin Craftsmen.