Cast Iron Stove Kazan Kitchen Flange Oven Rings BBQ Grill Barbecue????????? Slab dimensions – 550×550 mm. Overall thickness -20 mm The thickness of the canvas is 11 mm. The thickness of the stiffener is 9 mm. Burner diameter – 420 mm (7-rings) Weight – 20 kg. Auctiva offers Free Image Hosting and Editing. Auctiva gets you noticed! Track Page Views With.