The lamp head refers to the head of an energy-saving lamp, usually E27/E26/B22/E14. E27 is needed by most of the markets. China basically uses this type of lamp; E26 is the United States and Canada; B22 is the British and British colonial countries, such as: India, Pakistan, Australia, etc.; E14 is a small lamp. Materials are copper, iron, aluminum, etc. The price is also from high to low. The difference is that the iron lamp has a long time to rust and the aluminum lamp head is relatively soft.
Instant Coffee Machine Co., Ltd. , http://www.nscoffeemachine.com