Features: Screw length approx 8.5MM and wiring port approx 4MM Welding free with hexagon screw with a high-grade black housing, oxidation resistance, and small distortion. It is mainly used for power amplifier chassis and speaker box terminals. It is mainly used for power amplifier chassis wiring posts. The length of the wiring post is approx 50mm, and it is recommended- that the board thickness within 5mm can be used Description: Dedicated for enthusiasts DIY Specifications: Type: HIFI Cable Terminal Name: Binding Post Connector Length: approx 50mm/1.97in Material: Brass+Rhodium Plating Terminal Type:Rhodium Plating/Gold-Plating Color: Black / Red Unit weight: 40g/pc Application: Audio&Video System Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. Package includes: 1PC Binding Post