This is a screw-type terminal for securing wiring. Package Contents: ・4-gauge screw-type ring terminal: 1 piece ・Size: 39x14x14mm ・Outer diameter of the tip: 12mm ・Inner diameter of the tip: 8mm ・Inner diameter of the wiring section: 8.5mm #Hams' Audio Parts #Hams' Terminals ＜＜Shipping＞＞ ・Yu-packet Orders paid in the morning will be shipped the same day, but we are closed for shipping on weekends and holidays.