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.020" (.50 mm) THICK x. 040" (1.0mm) GROOVE SPACING x. 011" (.28 mm) GROOVE WIDTH. Groove spacing is center to center of grooves. Digital Roundhouse is owned and administered by Camille Gorman. I am a retired teacher with 35 years experience.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.