Multiple adapters, parallel neck, is a type of laboratory glassware accessory used to connect multiple pieces of glassware with parallel joints to a single joint. It consists of multiple sockets or cones, arranged in a parallel fashion, that fit onto or into the parallel joints of the glassware components.

The multiple adapters allow multiple glassware components to be connected to a single joint, allowing for versatility and flexibility in laboratory setups. This type of adapter is commonly used in chemical experiments, especially in the areas of distillation and reflux, where it is important to have a secure and leak-proof connection.

The multiple adapters ensure a tight seal between the glassware components, minimizing the risk of leakage or contamination during the experiment. The parallel neck design of the multiple adapters allows for the integration of multiple glassware components into a single setup, making it a useful tool for laboratory professionals.