File:Birch plywood.jpgDescriptionBirch plywood.jpg English: Finnish birch plywood. 15 mm thick. Date 4 February 2009 Source Own work Author Bystander
File:Holey cube in birch plywood.jpgDescriptionHoley cube in birch plywood.jpg English: Large laser cut holey cube with mirrored sphere. Date 23 May 2012, 17:15:15 Source https://www.flickr