Heavy duty XT150 connectors, from the same manufacturer of genuine XT60 connectors.
The XT150 connector is an improved version of 6.0mm bullet connectors. It is heavier and longer than normal 6.0mm connectors.
The price is for two pairs of XT150 connectors as shown in the product photo.
7u gold plated copper connectors.
Handles up to 150A constant current.
Easy to solder.
The nylon case can tolerate a temperature up to 120 degrees Celsius.