8Pcs Gold Plated Musical Audio Speaker Cable Wire 4mm Banana Plug Connector 4 pairs of 4mm banana musical speaker cable plugs ( 4 x Red and 4 x Black ) Compatible with up to 4mm diameter of speaker cables. Stackable for bi-wiring or running multiple sets of speakers. Material: Metal. Size: About 40 x 10mm / 1.58 x 0.39" Plug Size: About 5 x 14mm / 0.20 x 0.55"