Premium materials: The bath bomb molds are made from durable, sturdy, non oxidizing food safe aluminum are strong enough to last longer. Design: bath bomb mould is made of high quality aluminium metal, does not bend, indentation, rust and breakage, very durable and sturdy, easy to demould, easy to clean, reusable Wide Application:bath salt ball moulds can not only be used for DIY bath bombs but also For moulding food: jelly, chocolate, cheese, mousse, pudding, etc. You can do it with your family and friends and enjoy a nice weekend. Easy to release: due to the smooth surface of the molds, your finished bath bomb could be easily taken out from the molds without tearing as well as maintaining its shape, convenient for both DIY beginners and skilled people to operate Product packaging: Metal bath bomb mould ball in 3 different sizes,comes 4.7 cm, 5.6 cm, 6.5 cm, in diameter, 5 pieces of hemispheres per size, sufficient quantity and different sizes can meet your different DIY craft needs