3B Cookware square cake mould in aluminium, made in sizes 1, 2 and 3 that nest one inside the next. Each mould is a deep, straight-sided square tin with rounded corners and two rounded flat lugs on opposite sides to hold it by. The size number is printed on each label beside the 3B Cookware mark, so the three sizes are easy to tell apart. These moulds, also called square cake tins, are used for baking square cakes and other bakes in the oven.