A. Double-screw sealing design: This banana plug audio connector is a 24K gold-plated double-screw locking speaker connector that allows for long-term signal transmission. It can isolate the wires to prevent short circuits and secure the wire connection through two setscrews. B. Easy to install/material: The banana plug makes the installation of speaker wires relatively easy. It is suitable for use with A/V receivers, amplifiers, surround-sound equipment, and banana wall panels. The materials are pure copper, gold-plated, and non - magnetic pure copper. The 24K gold-plated design enables relatively high signal transmission and ensures a certain degree of durability. C. Suitable for speaker wires of various sizes: It can accept wires with a maximum diameter of up to 4.5 millimeters. It is compatible with speaker wires ranging from 8AWG to 20AWG. Adopting a double-screw design, soldering is not required. The surface is subjected to gold plating with 24K gold. D. Wiring method: Double-screw fixation, surface soldering; Interface: 4.5 millimeters; Wiring method: Double-screw fixation, no soldering required. E. Color: Black + silver. F. Material: Metal. G. Package contents: 20 pieces of 4.5-millimeter banana plugs. Only the above package contents are included, and other items are not. H. Precautions: Light reflection and different monitors may cause slight differences between the color of the item and the actual product. The allowable measurement error is plus or minus 1 - 3 centimeters.