There are two regular cooling wires for most Australia wholesale bakeries, including CW816SS: 406x737 CW818SS: 457x737, both two items are made of stainless steel wires for cooling purpose. RK Bakeware has made quite lots of those cooling trays for industrial bakeries in Australia, we improved the quality by electrolysis surface treatment, which make the trays more shining and anti-rusty. For more details, please kindly check the picture and videos as following