Netherton Foundry Heavy duty range cooker baking sheet (for AGA style ranges)Shropshire made black iron range cooker baking sheet Fits directly onto the oven runners of full size AGA range cookers Developed with Val Stones, star of The Great British Bake Off 2016. Heavy duty, 2mm thick black iron sheet. Perfect for biscuits, breads, pastries and much more. Pre seasoned with flax oil for a natural non stick finish Durable 99. 1% pure black iron with a brass Netherton branded rivet Heavy duty and thick sided, for superb, even