It is made of 1st quality stainless steel. With the Adjustable Pastry Circle, you can have many sizes in a single circle instead of multiple circles in professional kitchens. You can make cakes, cakes, sponge cakes, musk, ganache, gel, Turkish delight, cream, parfait, charlotte and wedding and birthday cakes. Adjustable cake circle round: diameter 15x30 height 9 cm Adjustable cake circle square: 28x52 height 8 cm Circle closed size 16cm / open size 30cm Square closed size 20cm / open size 38cm