Suitable for most speaker cables. Each "leg" is 2.5 inches long, and heat shrinkable tubes come in three sizes: 10 mm, 8 mm (black) and 7 mm (red), 2 feet each (as shown). It provides more flexibility for installers to terminate cables. You can keep or shorten these lengths according to the installation requirements. Recommended wire size: round or double row speaker wire - maximum diameter of large hole: 8-10 mm, maximum leg output diameter of small hole: 3-4.6 mm. Price includes: 12 trumpet trousers (y boots) + 12mm (2 feet) + 8mm (2 feet in red and black) 2:1 heat shrinkable tube