Catnic Lintels - The full range of Catnic steel lintels and accesories are available from Elintels. Catnic Lintels are the market leading lintel manufacturer, with full technical support, free scheduling service and a dedicated design team. Elintels have huge stocks of standard lintels, heavy duty lintels and extra heavy duty lintels for delivery in 2-3 days or sooner if required.