Four SWITCHCRAFT "380" model phone connectors. These are a short type, about 1.5cm shorter than the "280", making them ideal for patch cables in an effects board. I bought these but never used them, so they are being offered unused. Compatible cable diameter: up to 7mm Insulating sleeve inside the housing From a smoke-free, pet-free environment. The current Soundhouse price is 900 yen per connector. https://www.soundhouse.co.jp/products/detail/item/73911/