Commonly used transformer cores are generally made of silicon steel sheet. Silicon steel is a silicon-containing (silicon, also known as yttrium) steel with a silicon content of 0.8 to 4.8%. The core of the transformer made of silicon steel is because the silicon steel itself is a magnetic material with strong magnetic permeability. In the energized coil, it can produce large magnetic induction, which can make the transformer smaller in size. Cans For Juice,Mini Juice Cans,Mini Orange Juice Cans,Small Cans Of Juice Guangdong Jasper Import and Export Co., Ltd. , https://www.jaspercans.com