The banana plug makes it easy to install speaker cables and is ideal for use with A/V receivers, amplifiers, surround sound systems, etc. The ABS shell, insulation material, pure copper gold-plated surface, resistance to oxidation and corrosion, make the sound quality more smooth. 90 degree right angle design saves energy. space. The red/black combination is used to code and identify the speaker wires. Easy to install, no soldering required. The 4mm banana plug is compatible with speaker wire from 12 AWG to 20 AWG. L-shaped banana plugs are used for speaker wire, wall panels, theaters home audio/video receivers, amplifiers and audio systems. Product Feature: 1. Gold plated copper 4mm right angle banana connector. 2. Wear-resistant design, L-shaped, good contact effect. 3. Socket diameter: 4 mm. 4. The snap ring uses a red/black code to identify polarity. 5. Compatible with 12 AWG to 20 AWG speaker wire. 6. Compatible with most speakers. Package included: 6 90 Degree Banana Plugs (Red) 6 90 Degree Banana Plugs (Black)