The housing of optoelectronic connector accessories is usually made of high temperature resistant and corrosion-resistant materials to protect the electronic components inside the connector. Common materials include metals (such as aluminum alloys, stainless steel, etc.) and engineering plastics (such as polyamide, polyimide, etc.). The design of the casing usually takes into account the sealing, waterproofing, and seismic performance of the connector to ensure that it can function properly in various harsh environments. In addition, the housing may also contain fixing devices for connectors to facilitate installation and fixation of the connectors.