Uxcell a15071500ux0418 Black Red Plastic Housing Binding Post Banana Jack Adapter for 4 mm Safety Protection (Pack of 10) Product Name: Binding Post; Fit Banana Plug Dia.: 4mm/ 0.16" Overall Size: 30 x 14mm / 1.2" x 0.55" (L*Max. D);Main Material: Metal Main Color: Silver Tone, Red, Black Net Weight: 44g Package Content: 10 x Binding Post