The lifting gourd contains many models: hand -stretched gourds, hugs, and electric gourds. Electric gourds are divided into: group hanging gourd, high -speed gourd, etc. The chain is the main component of the gourd. The specifications selected by the lifting gourd chain are generally not too large. 6 mm, 7mm, 8mm, and 10 mm are more common. Because the high -speed gourd is fast, the chain is prone to wear. Therefore, when making high -speed gourds, some manufacturers' chain surface treatment will choose carburizing treatment. Of course, the price of the carburizing chain is also much more expensive than the black processing chain.