Made from Brazilian Mahogany, Domino Sipo Tenons are rot resistant, making them ideal for outdoor applications or creating a beautiful contrasting effect on lighter wood projects. Rotation-proof, solid wood Domino tenons fit precisely in the mortise created by the Domino XL. All Dominos feature glue expansion slots that are designed into their surface to ensure a solid, long-lasting joint. These tenons are all 750mm (29-1/2″) long and can be custom cut to suit any application.